room acoustic solutions

7/30/2019 Room acoustic solutions

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www.egger.com

EGGER ACOUSTIC SOLUTIONS

ROOM ACOUSTIC SOLUTIONSWITH WOOD BASED PANEL PRODUCTS

PROFESSIONAL



The hardly noiceable micro peroraion eaure o EGGER acousic elemens signicanly reducesreverberaion ime wihou compromising decoraiveexpecaions.



CONTENTS

Foreword, Inroducion

1. ROOM ACOUSTIC SOLUTIONS

2. FIELDS OF APPLICATION FOR EGGER ACOUSTIC BOARDS. Wall panelling and pariion walls

. Ceilings and ceiling sysems

.. auriLUX lighing sysem

. Furniure componens

. Rerospecive insallaions

3. EGGER ACOUSTIC PRODUCTS

4. CASE STUDIES

5. THE ABC’S OF ACOUSTICS

6. SAMPLE SERVICE AND CONTACTS

. Peroraed producs

.. ProAcousic Classic

.. ProAcousic Furniure Boards

.. ProAcousic Fines

.. ProAcousic Fines Furniure Boards

.. ProAcousic EURODEKOR®

.. ProAcousic EURODEKOR® Furniure Boards

.. ProAcousic Laminaed Composie Boards

.. ProAcousic Laminaed Composie Furniure Boards

.. ProAcousic light Furniure Backs

.. Peroraions – Overview

.. Individual peroraions

. Sloed producs

.. ProAcousic EURODEKOR® MDF

.. ProAcousic Laminaed Composie Boards.. Sloed specicaions – Overview

. Sock Range

. Order specic producs

. Sound Absorpion Coecien Values

.. Peroraions

.. Sloed specicaions

. Processing Recommendaions

.. Transpor and Sorage

.. Panel sizing

.. Edge processing

. Insallaion Insrucions and Mouning Sysems

.. Wall Panelling

.. Pariion Walls

.. Ceilings

.. Furniure Componens

.. Rerospecive Insallaions

. Produc Presenaion and PoinoSale Suppor

. Samples

. Parners



Case sudy BMZ Biomedical Cenre o he Universiy Hospial in Bonn,Germany. A he BMZ, sraigh and curved ProAcousic elemens wereused o clad walls and ceiling. The microperoraions on he maplesurace are //. peroraions. This specicaion no only alloweddesign expecaions o be ullled, bu also requiremens or perecroom acousics o be implemened.



Creaing soluions or good acousics, especially in public areas and oces, has become an increasingly morechallenging ask or designers and archiecs alike. In many areas o lie, more and more imporance is beingaached o reciprocal hearing and percepion and, a he same ime, o he desire or quieness and comor;

no only in privae lie, bu also a work. Many sudies o he ineracion beween room acousic condiions,noise exposure and learning success hereore highligh he relevance o room acousical qualiy. Correspondingresearch resuls were one o he reasons or he revision o he DIN “Acousical qualiy in small omediumsized rooms” and he signican reducion in recommended reverberaion imes in class rooms in heamended version.

Bu he growing imporance o acousics is also eviden in oher areas where inensive communicaion exchangesake place – conerence and lecure halls, callcenres, recepion halls, and openplan oces. However, currendesign rends and building physics o modern archiecure requenly conic wih appropriae room acousiccondiions. In erms o planning, hermoacive building componens (e.g. concree ceilings) or exensivelyglazed building açades necessiae innovaive approaches o he posiioning o acousically eecive elemens.Absorbing walls and urniure wih sound absorbing properies are oen signican ools in he acousicdesign o modern living, learning and working environmens.

Annoying noises and he resuling exposure o loud living or working environmens are increasingly perceivedas sressul. Public ocus on noise as an environmenal acor is seadily growing. There are many acors hainuence he acousic qualiy which suis he use o a room. The suraces o he room boundaries and hexures and ings wihin should a bes ensure ha good acousics are provided or he inended use o heroom. The acousics in a room should conribue o our percepion o speech, music or oher sounds as beingneiher oo loud nor oo quie, allow us o communicae wihou any eor and make us eel comorable.

As par o he complee range o wood based panel producs, EGGER oer comprehensive soluions in he eldo acousics which combine he opics o sound absorpion and design. Wood based producs are paricularlysuiable or his purpose as hey oer a variey o abricaing and value enhancing possibiliies.

The EGGER produc specrum comprises our applicaion areas in paricular:

Wall panels, including xed wall panelling or acousically eecive pariion walls or openplan ocesAcousically eecive, permanenly mouned ceiling sysemsFurniure componens, e.g. rons, cabine backs or carcase sidesRerospecive insallaions in exising room siuaions, e.g. ceiling clouds or individually preabricaedsysem componens, i.e. baes.

To provide orienaion and proessional suppor or hose who are aced wih he complex subjec maer acousics, we have inegraed ino his brochure in Chaper a comprehensive ABC o Acousics. This secionwas compiled wih he assisance o physiciss Dr. Caja Hilge and Dr. Chrisian Nocke o Akusikbüro,Oldenburg, Germany. I denes he mos relevan erms on his subjec and explains he mos imporanrelaionships beween room acousics versus building acousics.

1. ROOM ACOUSTIC SOLUTIONS

FOREWORD

„WHY IS THE IMPORTANCE OF ACOUSTICS

STEADILY INCREASING AND WHAT ARE CO-

OPERATION PARTNERS EGGER AND AKUSTIK+

OFFERING IN THIS FIELD? WE WOULD LIKE

TO ANSWER THESE QUESTIONS ON THE FOLLOWING PAGES OF THIS BROCHURE.“

MICHAEL BECKMANNHEAD OF PRODUCT MANAGEMENT LAMINATES AND ACOUSTIC PRODUCTS

1. R O O M A

C O U S T I C

S O L U T I O N S



2. FIELDS OF APPLICATION OF EGGER ACOUSTIC BOARDS

ROOM ACOUSTIC SOLUTIONS USINg DECORATIvE WOOD BASED PANEL PRODUCTS

To enable us o respond o he large variey o asks wih opimum ailored soluions, we have developed asysem ha oers he mos diverse peroraion and slo specicaions. This allows you o doveail preciselyuned absorpion properies wih individual and aesheic design expecaions. The peroraion or sloconguraions can be applied o cerain ypes o subsrae and almos every imaginable surace nish.Our acousic elemens and heir individual specic conguraions are he resul o an inerplay o maerialsand consrucive requiremens.

As wood based maerials are generally easy o abricae,he populariy o our decoraive acousic elemens inurniure consrucion is increasing in addiion o heir classic applicaion as wall panels.



2.1 WALL PANELLING AND PARTITION WALLS

EGGER acousic producs are ideal or xed wall panel insallaions, e.g. in oyers, concer or conerence halls. They can be used as acousically eecive pariion walls in openplan oces,caneens, resaurans or corridors. For hese applicaion areas, producs wih a single sideddecoraive nish are usually seleced i.e. he reverse o he panels is covered wih a blackacousic eece as sandard.

We recommend he ollowing acousic producs or wall panelling or pariion walls depending onroom acousical or decoraive requiremens:

2.2.1 F

I E L D S O F A P P L I C A T I O N

ProAcousic Classic(Peroraion //.)

ProAcousic EURODEKOR®

(Variable peroraion)ProAcousic EURODEKOR®

MDF (Variable slos)ProAcousic LaminaedComposie Boards(Variable peroraion)

ProAcousic Fines(Peroraion ././.)



Conerence room a Barenbach LichLabor GmbHin Aldrans near Innsbruck, showing ProAcousic

ceiling wih inegraed LED lighing echnology.



2.2 CEILINGS AND CEILING SySTEMS

2.2 F I E L D S O F A P P L I C A T I O N

We recommend he ollowing acousic producs or ceilings or ceiling sysems depending onroom acousical or decoraive requiremens:




(Variable peroraion)ProAcousic LaminaedComposie Boards(Variable peroraion)

Room boundary suraces such as ceilings lend hemselves paricularly well o he insallaion o acousicproducs. I necessary, he enire expanse o a ceiling can be uilised as absorpion surace and wha’smore, he subconsrucion can be accommodaed wihou resricing he available space wihin a room.The required subconsrucion simulaneously provides he necessary clearance or caviy below he acualceiling, which is essenial or eecive sound absorpion. Room lighing is he hird and addiional aspec

o consider, as ceilings radiionally play a major par in he implemenaion o many lighing syles.

This combinaion o ligh and acousics unies wo essenial archiecural opics and represens anappropriae developmen a a ime when demands and design expecaions or residenial and commercialspaces are seadily increasing. Especially or consrucion projecs involving exising srucures, he ocusis no only on uncional bu especially also on aesheic aspecs ha reec he curren Zeigeis andrend. Archiecs, radespeople and also he urniure indusry can mee hese requiremens wih EGGERproducs. New produc conceps and sysem soluions such as acousically eecive ceiling elemenswih highpower LEDs oer innovaive and modern design elemens.

The concep developed by EGGER and is parnersAkusik Plus, Barenbach Lichlabor and DigialElekronik is a lighing soluion ha mees hehighes design and uncional sandards, combininglighing and acousics ino an inegraed sysem.One o he numerous advanages is he lowsrucural heigh o jus mm. As a modular ceilingsysem wih a layou ha can be cusomised,he concep wih a broad selecion o wood,

uni and anasy decors oers exensive designreedom. Recyclable componens and mercuryreeilluminans ensure he environmenal compaibiliyo he sysem. Thanks o energyecien lighingechnology and acousic boards made o herenewable raw maerial wood, he concep issusainable wih a long liespan o up o hours.

LIghTINg AND ACOUSTICS IN ONESySTEM



2.2.1 auriLUX LIghTINg SySTEM

Thanks o he specially designed lens opics, ligh is emied in a cone ha assures glareree lighing under all normal viewing angles. As a resul, only small openings jus mm in size are visible in he ceiling viewedrom below. The highpower LEDs wih lens opics and inegraed driver elecronics are concealed in a compachousing behind he acousically eecive surace. These unis orm a plugin sysem wih a modular srucure,permiing a variey o arrangemens such as rows or arrays. Combining warm whie and dayligh whieLEDs allows he colour emperaure o be coninuously adjused rom o Kelvin.The inelligencombinaion o energye cien lighing echnology, acousic eeciveness and ceiling panels opens upenirely new inerior design possibiliies wihou any compeiion beween lighing and archiecure.The sysem is a highly uncional and susainable lighing soluion ha mees demanding design sandards.

Principal cross secion hrough a ceiling panelauriLUX deailed cross secion

auriLUX MODULE 64 2 × 5

DIMENSIONINg ThE LIghTINg SySTEM

.

.

.

2.

.

.

lx

lx

lx

lx

lx

lx

.

.

.

2.

.

.

h (m) (m)E

The dualrow module rom he Aurilux sysem wih highpower LEDs a mm inervals per row is ideal or rooms wih a high luminous ux demand per uni area.I can be realised wih singlecolour lighing such as cool

whie, neural whie and warm whie or as a dimmablesysem. Sophisicaed, hermally opimised hea ranser rom he LED o he housing guaranees he longespossible LED liespan. An addiional hea sink is nolonger required.

The cone diagram models he achievable averageilluminaion in relaion o he insallaion heigh o helighing sysem. This allows he user o deermine heapproximae dimensioning. However, a lighing designer should be consuled in order o precisely calculae andplan a highqualiy lighing sysem.

auriLUX cone diagram ×



2.2.1 F I E L D S O F A P P L I C A T I O N

MODULAR STRUCTURE STRAIghTFORWARD INSTALLATION

Akusik Plus preassembles he insallaion and connecionmodules in accordance wih individual projec planning.All modules include preinsalled wiring and pass a qualiyassurance process on he es sand.

Working wih preabricaed modules aciliaes planning,commissioning and insallaion while also makingsubsequen revisions sraighorward.

Microperoraions ha are barely percepible o he user are applied o he acousically eecive ceiling elemens. A highly eecive broadspecrumabsorber, which is especially well suied o he requency range o human speech, is concealed behind he surace which is available in a largeselecion o decors. The coreboard is made o susainable woodbased maerials.

× series module sizes



316636

9561276

1596

PRINCIPAL CROSS SECTION ThROUgh

A CEILINg PANEL

suspension

All commercially available ceiling sysems are suiableor insallaion. The example shows a classic suspendedceiling.

Barenbach Lichlabor



ENTRANCE AREA OF ThE EggER CUSTOMER FORUM

The enrance area o he EGGER visior orum was equipped wih he ligh and acousics concep in June o .A modern ambiance resuls rom he combinaion o he Premium Whie decor and a glossy surace. Prior o heconversion, he lighing siuaion in he room was unbalanced as a resul o an unsuiable luminance disribuion.Direc and reecion glare in he reecive oor was anoher problem.The redesign increased he illuminaion and luminance level. A balanced luminance disribuion was achievedhanks o he lighing sysem, which ades ino he background and pus he archiecure ino he spoligh.

Beore he conversion

Peer Barenbach, München

EggER vIDEO CONFERENCE ROOM

An LED ceiling made o ProAkusik boards in he Premium Whie decor wih he glossy ST surace was insalled inhe EGGER video conerence room in June o . The uncionally and aesheically appealing soluion creaes apleasan amosphere in he room.

Beore he conversion: Glare rom hedominan ligh xures impairs percepion.

Aer he conversion, even basic lighing ha has been opimally inegraed ino he room layou ensuresa sable opical percepion, leading o physical wellbeing and aigueree work.


Barenbach Lichlabor

Barenbach Lichlabor



2.2.1 F I E L D S O F A P P L I C A T I O N

yOUR ADvANTAgES

LIGHT AND ACOUSTICS IN ONE SYSTEMInegraed ino he archiecureLow srucural heigh o jus mmEspecially well suied or projecs inexising srucures

BRILLIANT, TWO-DIMENSIONAL LIGHT brillian ligh gives maerialsa highqualiy eecso shadows due o wodimensional array

GLARE FREEsuiable or compuer screen worksaions and areas wih highdemands on visual comor

CHANGEABLE LIGHT COLOUR

adjusable rom warm whie o cool whieor various ligh ambiences

HIGH-QUALITY ACOUSTIC SOLUTIONbarely noiceable micro peroraionand opimal room acousic

CREATIVE FREEDOMmodular, reely designable ceiling sysemlarge choice o plain decors,wooden decors and anasy designs.

PROJECTS IN EXISTING STRUCTURESubsequen renovaion and remediaionImprovemen o room acousics andlighing condiions

SUSTAINABLE

Energye cienMercuryree illuminansLong liespan up o hoursSusainable maerial woodRecyclable componens

akustik plus gmbh & Co. Kg

Indusriesraße

Wächersbach

Germany

t + () /

f + () /

[email protected]

www.akusikplus.com

Consuling, planning, abricaion and disribuion o preassembled ligh and acousic modules ready or insallaionrepresen he core compeence o Akusik Plus.

CONTACT LED AURILUX

DEvELOPMENT PARTNER

Bartenbac LictLabor gmbh

Rinner Sraße

Aldrans

Ausria

t + () –

f + () –

[email protected]

www.barenbach.com

Diital Elektronik gmbh

Berchesgadner Sraße

Garenau bei Salzburg

Ausria

t + –

f + –

o [email protected]

www.digialelekronik.com



Furniure componens usually require a decoraivesurace nish on boh sides and hereore a specialproduc srucure.



2.3 FURNITURE COMPONENTS

Quie requenly, curren design rends and building physics o modern archiecure conic when icomes o he implemenaion o appropriae room acousic condiions. In erms o room planning,hermoacive building componens (e.g. concree ceilings) or exensively glazed building acadesnecessiae innovaive approaches o he posiioning o acousically eecive elemens.

For his reason, he imporance o sound absorbing suraces has seadily grown in urniure consrucion.As he need arises, exising urniure ranges can be ed wih complemenary acousically eeciverons, backs or carcase sides in maching decors and maerials.


We recommend he ollowing acousic producs or urniure componens, depending onroom acousical or decoraive requiremens:

ProAcousic FurniureBoards(Peroraion //.)

ProAcousic light

Furniure Backs(Peroraion //.)

ProAcousic EURODEKOR® Furniure Boards(Variable peroraion)

ProAcousic LaminaedComposie Furniure Boards(Variable peroraion)

ProAcousic FinesFurniure Boards(Peroraion ././.)



Ceiling clouds or special, preabricaed sysem componens(e.g. ba es) are always made o individual order. This givesa ree reign o a myriad o design possibiliies.




2.4 RETROSPECTIVE INSTALLATIONS


EGGER acousic producs are ideally suied or rerospecive insallaions in exising room siuaions.As hey ac as a compac, highly eecive broadband absorber o he speech relevan requency range,many individual soluions can be creaed and cusomised o specic room siuaions. e.g. ceilingclouds or individually preabricaed sysem componens, i.e. baes.

We recommend he ollowing acousic producs or urniure componens, depending onroom acousical or decoraive requiremens:

ProAcousic LaminaedComposie Boards(Variable peroraion)

ProAcousic LaminaedComposie Furniure Boards(Variable peroraion)

ProAcousic Furniure Boards(Peroraion //.)


(Variable peroraion)ProAcousic EURODEKOR®

Furniure Boards(Variable peroraion)

ProAcousic Fines Furniure Boards(Peroraion ././.)





EGGER acousic producs are available in a wide range o chipboard, MDF and lighweigh subsraes. Decorsor laminae bonded and melamine aced boards may be seleced rom he comprehensive decor range oeredby he EGGER ZOOM® Collecion. Lacquered pain inishes in RAL colours or he NCS colour sysem, as wellas real wood veneers, complemen and complee he selecion o colours and decors available. EGGER andAkusik+ oer a ailormade produc range and individual advice or your speciic requiremens. Irrespeciveo wheher you are ineresed in ullsize producion boards, cusommade componens, ire raed or sandardsubsraes and even bespoke soluions wih real wood veneers, we shall be pleased o suppor and advise youin erms o echnical applicaion, choice o consrucion and iings.

3. EGGER ACOUSTIC PRODUCTS

The appeal o our sock produc ProAcousic Classic lies in he hardlynoiceable microperoraion by virue o he impressively small drillhole diameer o jus . mm. One square mere o board comprises

. holes. They remain barely visible, even a an observancedisance o approximaely . m, so ha he original woodgrain lookremains unaeced.

3.1 PERFORATED PRODUCTS

3.1.1 PROACOUSTIC CLASSIC

EGGER Laminae, linear peroraed

EUROSPAN® JP F.(F****), mm

EGGER backing laminae, linear peroraed

Black Acousic Fleece

Fields o applicaion:




3.3.13.1.13.1.23.1.3 A

C O U S T I C P R O D U C T S

3.1.2 PROACOUSTIC FURNITURE BOARD

EGGER Laminae, diagonally peroraed






3.1.3 PROACOUSTIC FINEST

EGGER Laminae, diagonally peroraed


EGGER backing laminae, diagonallyperoraed




3.1.4 PROACOUSTIC FINEST FURNITURE BOARD









3.1.6 PROACOUSTIC EURODEKOR® FURNITURE BOARD

EURODEKOR® peroraed

EUROSPAN® peroraed





3.1.5 PROACOUSTIC EURODEKOR®






3.1.43.1.53.1.63.1.7 A

C O U S T I C P R O D U C T S3.1.8 PROACOUSTIC LAMINATED COMPOSITE FURINTURE BOARD

3.1.9 PROACOUSTIC light FURNITURE BACKS

3.1.7 PROACOUSTIC LAMINATED COMPOSITE BOARD




EUROSPAN® peroraed

Paper Honeycomb

EUROSPAN® peroraed













3.1.8 PERFORATIONS – OvERvIEW

We are able o oer a very wide range o dieren peroraions which can eiher be applied o hewhole surace area or o a designaed secion only (Excepions ././. and //.).

Peroration Illustration scale : Products Open surace [%]

Number o perorations [No./m²]

Fields o

application

././. ProAcoustic Finest

ProAcoustic FinestFurniture Board

. %, No./m²

//. ProAcoustic Classic

ProAcoustic FurnitureBoard

ProAcoustic light Furniture Backs

. %

, No./m²

//.

Furher opions:

4/4/.0

ProAcoustic EURODEKOR®

ProAcoustic EURODEKOR® Furniture Board

ProAcoustic LaminatedComposite Board

ProAcoustic LaminatedComposite FurnitureBoard

. %, No./m²

1. %

././.././.

Furher opions:.3/.3/.




ProAcoustic LaminatedComposite FurnitureBoard

. %. %, No./m²

1.3 %

././.././.

Furher opions:.4/.4/1..4/.4/.




ProAcoustic Laminated

Composite FurnitureBoard

. %. %, No./m²

4.3 %1.0 %



Explanaory Noe: Peroraion example //. = mm disance horizonally and mm vericallymeasured rom cenre hole o cenre hole, wih a hole diameer o . mm

Legend : Fields o applicaion

Wall panelling andpariion walls

Ceilings

Furniure componens

Rerospecive Insallaions

Peroraion examples:

3.1.8 A C O U S T I C P R O D U C T S

H1277 ST9 Ligh Lakeland Acacia5./5./2. mm . % open surace5,2 peroraions /m2

F274 ST9 Ligh Concree.6/.6/. mm . % open surace, peroraions /m2

Peroration Illustration scale : Products Open surace [%]

Number o perorations [No./m²]

Fields o

application

//.//.

Furher opions:8/8/1.8/8/.



. %. %, No./m²

.8 %. %

././.././.

Furher opions:

10./10./.010./10./.10./10./.0



. %. %, No./m²

.8 %4.3 %1.3 %

//.

Furher opions:1/1/3.01/1/4.01/1/.01/1/8.0



. %, No./m²

.8 %4. %11.0 %1. %

//.

Furher opions:3/3/4.03/3/.03/3/8.03/3/10.03/3/1.0



. % No./m²

1. %1. %4. %. %11.0 %



. SLOTTED PRODUCTS

.. PROACOUSTIC EURODEKOR® MDF

.. PROACOUSTIC LAMINATED COMPOSITE BOARDS

EURODEKOR® MDF, slotted

EGGER Laminate, slotted

Black Acoustic Fleece

EGGER MDF, slotted

EGGER Laminate, slotted


.. INDIVIDUAL PERFORATIONS

Individual perforations offer freedom of choice in terms of perforation diameter, pitch and proportion of perforated

surface area. You can also chose a frame effect feature on your elements, if you so wish. The possibilities are endless,

regardless of whether your design is led by visual or technical aspects (Exceptions 1.8/1.8/0.5 and 3/3/1.0).

F ST Quartz Inox

Individual Perforation

Fields of application:

Fields of application:



.. SLOTTED PATTERNS OVERVIEW

Also available now with immediate effect are slotted panels, which our customers have frequently asked for

and offer a visual alternative to the classic perforations.

Slot pattern ) Illustration scale : Products ) Open surface %Number of

perforations No./m²

Fields of application )

Linear Micro /,/,


MDF


, %

. No./m²

Linear Micro 3232/28,6/3,4


MDF

ProAcoustic Laminated

Composite Board

, %

. No./m²

) Slotted patterns are only offered in combination with MDF substrates. Explanatory note: example 16/12.6/3.4 = 16 mm

distance from centre groove to centre groove/12.6 mm slat width/3.4 mm mm groove width. Within the groove there are

3.0 mm drillings in a 4 mm pitch) Legend: Fields of application

..

.

..

..

.. A C O U S T I C P R O D U C T S

Wall panelling andPartition Walls

H ST Light Lakeland Acacia

Linear Micro , % open surface

. drillings /m

H ST Hacienda Black


. drillings /m

H ST Light Lakeland Acacia


. drillings /m

H ST Hacienda Black


. drillings /m

Examples of slot patterns:



3.3 STOCK RANGE

Our product ProAcoustic Classic, eaturig the hardly oticeable //. micro-peroratio, is available ex stock

i te dieret decors.

STOCK DECORS, IMMEDIATE AVAILABILIT Y → board size ,8 × , × mm – urther decors o request

H1951 ST15 Siea Calvados

U999 ST2 Black

U708 ST2 Light Grey

H1920 ST9 natural Tyrolea Beech

H1334 ST9 Light Ferrara Oak

H3704 ST15 Tobacco Aida Walut

F509 ST2 Alumiium

W980 ST2 Platium White

H1696 ST15 Piemot Cherry

H1887 ST9 natural Starberg Maple

EGGER Lamiate, liear perorated

EUROSPAn® JP F0.3 (F****), 8 mm

EGGER backig lamiate, liear perorated





3.3

3.4 A C O U S T I C P R O D U C T S

3.4 ORDER SPECIFIC PRODUCTS

Our products ProAcoustic Furiture Boards ad ProAcoustic light Furiture Backs ca be oered i

cojuctio with our stock rage i te lamiate decors with a miimum quatity o as little as oeboard. All other acoustic products, perorated or slotted, are produced to order oly i accordace

with idividual customer specifcatios.

AVAILABILITY GUIDE

Maximum Dimesio:

Lamiate suraces → , × , mm

EURODEKOR® melamie aced → , × ,7 mm

Veeered boards → , × ,7 mm

Lacquered suraces → , × , mm

Board thickesses rom 4 to 8 mm – depedet upo type o substrate ad surace fish

Delivery:

Supplied i ull sheet sizes or as bespoke pre-abricated compoets, exclusively made to order

Lead times:

Upo request

GENERAL TECHNICAL DATA

Substrate: EUROSPAn® JP F0.3 (F****), 8 mm

Board Size: ,8 × , × mm – perorated omial width , mm

→ Other sheet sizes ad bespoke pre-abricated elemets available o request

Delivery: exact umber or boards per pack

Weight: . kg/m²

Peroratio: //. – hole diameter mm – mm liear pitch

Colour matches: EURODEKOR® melamie aced wood chipboard as well as

mm EGGER ABS edgig, available rom stock.



3.5 SOUND ABSORPTION COEFFICIENT VALUES

Sound absorpion coecien values or all our producs are o course available and, on applicaion, we shallbe pleased o submi he relevan cericaes o you. The measuremens were deermined and evaluaed inaccordance wih DIN EN ISO 5 “Measuremen o sound absorpion in a reverberaion room”, ediion.The absorpion coecien values illusraed below apply o a caviy o mm and addiional aenuaionprovided by a mm layer o acousic mineral wool.

3.5.1 PERFORATIONS

Sound Absorpion Coecien according o ISO 5:2

* SAA = Sound Absorpion Average according o ASTM C 2** NRC = Noise Reducion Coecien according o ASTM C 2

Sound Absorpion Coecien αs

Sound Absorpion Coecien αp Sound Absorpion Coecien according o ISO 65

Frequenc Perorations

[h]././.

[αs]//.

[αs]//.

[αs]././.

[αs]././.

[αs]

100 0.8 0. 0.1 0.1 0.1

1 0.40 0.38 0. 0.3 0.31

10 0.4 0.4 0.40 0.40 0.38

00 0.4 0.4 0.4 0. 0.0

0 0.1 0.1 0. 0.8 0.1

31 0.3 0. 0.8 0.84 0.8

400 0.83 0.0 0.4 0.3 0.

00 0.84 0.8 1.0 0. 1.01

30 0.83 0.8 1.04 1.00 1.01

800 0.83 0.8 1.0 0. 1.04

1000 0.80 0.84 0.8 0. 1.0

10 0. 0.80 0.8 0.4 0.4

100 0.3 0.3 0.8 0.8 0.88

000 0.8 0.1 0.81 0.83 0.8

00 0. 0. 0. 0.80 0.8

310 0. 0. 0. 0. 0.84

4000 0.3 0.4 0. 0. 0.

000 0.4 0.48 0. 0. 0.0

SAA* . . . . .

NRC** . . . . .


[h]././.

[αp]//.

[αp]//.

[αp]././.

[αp]././.

[αp]

1 0.40 0.3 0.30 0.30 0.30

0 0. 0. 0.0 0.0 0.0

00 0.8 0.0 1.00 0. 1.00

1000 0.80 0.8 0. 0. 1.00

000 0.0 0.0 0.80 0.8 0.8

4000 0. 0. 0.0 0.0 0.80

Perorations ././. //. //. ././. ././.

αw 0.0 0.0 0.8 0.8 0.0

Absorber class C C B B A




[h]//.

[αs]././.

[αs]//.

[αs]//.

[αs]

100 0.0 0. 0.0 0.

1 0.3 0.38 0.3 0.41

10 0.40 0.43 0.4 0.38

00 0.3 0.0 0. 0.4

0 0.4 0. 0.8 0.3

31 0.0 0.0 0.8 0.3

400 0. 0.80 0. 0.

00 0. 0.8 0. 0.4

30 0. 0. 0.8 0.4

800 0. 0.83 0.81 0.41

1000 0.8 0. 0.0 0.33

10 0.88 0. 0.0 0.

100 0.80 0.3 0.3 0.4

000 0. 0. 0.4 0.3

00 0.1 0.4 0.44 0.1

310 0. 0.3 0.43 0.1

4000 0. 0.3 0.43 0.1

000 0. 0.34 0.44 0.1

SAA* . . . .

NRC** . . . .



Sound Absorpion Coecien αp


[h]//.

[αp]././.

[αp]//.

[αp]//.

[αp]

1 0.30 0.3 0.3 0.3

0 0.0 0. 0.80 0.0

00 0. 0.80 0. 0.0

1000 0. 0. 0.0 0.3

000 0.0 0. 0.0 0.

4000 0.83 0.3 0.4 0.0

Perorations //. ././. //. //.

αw 0. 0. LM 0. (LM) 0.3 (L)

Absorber class C D D D

Sound Absorpion Coecien according o ISO 65

Sound Absorpion Coecien according o ISO 5:2

3.53.5.1 A




3.5.2 SLOTTED SPECIFICATIONS

The absorpion coecien values illusraed below apply o a caviy o mm and addiional aenuaion provided by a mm layer o acousic mineral wool.

→ The saed sound absorpion coecien values and ess are excerps only. Oher es xures have alsobeen esed and cericaes o he relevan sound absorpion coeciens are available on reques.Please le us know i you would like o receive hese.


Sound Absorpion Coecien according o DIN EN ISO 5

Sound Absorpion Coecien according o DIN EN ISO 65

Frequenc Slot Patterns

[h]Linear Micro

[αs]Linear Micro

[αs]

100 0.4 0.

1 0.38 0.38

10 0.4 0.3

00 0. 0.48

0 0.1 0.4

31 0. 0.3

400 0.8 0.

00 0.8 0.

30 0.88 0.

800 0.8 0.

1000 0. 0.3

10 0. 0.48

100 0.0 0.4

000 0.3 0.40

00 0. 0.3

310 0. 0.3

4000 0.8 0.38

000 0.1 0.41

SAA* . .

NRC** . .

Frequenc Slot patterns

[h]Linear Micro

[αp]Linear Micro

[αp]

1 0.3 0.3

0 0.0 0.0

00 0.0 0.0

1000 0.80 0.0000 0. 0.40

4000 0.0 0.40

Slot patterns Linear Micro Linear Micro

αw 0.0 0.0

Absorber class C D


Sound Absorpion Coecien αp



3.6 PROCESSING RECOMMENDATIONS

EGGER acousic boards are based on woodbased panel producs which have been laminaed wih a decoraivesurace – A or A subsraes exceped. Processing is as sraighorward as working wih oher woodbased panelproducs. General saey rules and undamenal processing guidelines or woodbased panel producs apply.To avoid he risk o injury, i is recommended ha proecive gloves be worn when handling EGGER ProAcousicpanels. Addiional sysem echnology or special adhesives are no required. I you have decided o work wihull press size boards, we shall be pleased o suppor you wih echnical advice ranging rom applicaion oprocessing, hrough o consrucion and ings.

3.6.1 TRANSPORT AND STORAgE

3.6.2 PANEL SIzINg

3.6.3 EDgE PROCESSINg

In erms o ranspor regulaions, EGGER Acousic Boards are no classied as a hazardous maerial; noidenicaion is hereore needed. For ransporaion and sorage purposes, ProAcousic elemens shouldbe kep in heir original packing or on surdy, a palles. EGGER ProAcousic elemens mus be sored inenclosed, dry sorage areas under normal amospheric condiions (approx. – °C and – % relaive

humidiy). Precondiioning o boh, elemens and edging maerial is essenial prior o abricaion.

Beore cuing o size, he elemen mus be aligned in line wih he rs row o peroraions. I he elemens are obe edged subsequenly, i is imporan ha oversized cu panels or blanks are prepared and ha he longiudinalcross cu is no carried ou unil aer boh sides have been edged.The elemens are cu using panel or panel sizing saws. The qualiy o he cu is dependen upon a variey o acors. Apar rom he correc heigh seing o he saw blade, machine and saw parameers mus be observed.

These include:

Feed rae → o m/min Speed o roaion → , o , rpmCuing speed → o m/sec.Tooh shape (carbide ipped) → Trapezoidal a ooh, alernaing ooh or poined Duplovi ooh

When cuing doublesided laminaed urniure boards on machines wihou scoring blade, a hollow/poinedooh saw blade has consisenly proved o give an excellen nish.

For he nal sizing i is possible o employ a DIA joining cuer on he edge banding machine. However, hemaximum raw board allowance should no exceed mm. I a all possible, he panels should be sized as paro he cuing process. Due o he alernaing surace characerisics o he subsrae i is recommended ha onlyEGGER ABS Edging in a hickness o mm be applied. Thinner edges should no be used in view o heir inerior spanning characerisics. Convenional ho mel adhesives such as EVA, Polyolen or PUR are suiable or bondingEGGER ABS edge banding o acousic elemens. Due o he special machining o he subsrae and he suraceperoraions or slo conguraions, some o he homel adhesive may ooze ou; or his reason he applicaiono a ransparen adhesive is recommended.

Please observe he machinery and adhesive suppliers’ insrucions.

3.5.23.63.6.13.6.23.6.3 A




3.7 INSTALLATION INSTRUCTIONS AND MOUNTING SySTEMS

EGGER acousic panels can be mouned and insalled in many dieren ways and wih he aid o a wide variey o xingsysems. The choice o available xing sysems is maniold and, depending on he use o he room, especially esedxing sysems mus be seleced, e.g. ball impac resisan sysems.

EGGER acousic elemens are suiable or use in dry condiions only. This is characerised by a moisure conen in hemaerial corresponding o a relaive humidiy o surrounding area only exceeding % or a ew weeks per year and aemperaure o °C. Beore an insallaion o acousic elemens can sar, he premises mus be adequaely dry, i.e.high humidiy levels, caused by oor screeding and plaser work and mus be reduced o a minimum. This poin isespecially imporan since EGGER acousic panels are woodbased and hereore hygroscopic, which means ha heyabsorb and release moisure. The peroraions or slos signicanly increase he board surace area, so ha ucuaionsin humidiy and climae can lead o dimensional changes or disorion. This poin is paricularly signican in view o heac ha nigh seback sysems in modern oce buildings can drasically change he room emperaure as well as herelaive humidiy. Adequae condiioning o he elemens on sie is hereore essenial. Furhermore, depending on heindividual size and inended use o he elemen, – ariculaed pars such a sliding doors or example – acousic elemensshould be ed wih alignmen ings rom he ouse (see also poin ...).

The ollowing insallaion advice should also be observed:

Subconsrucion and expansion gap mus be appropriae and accommodae he expanding and conracingbehaviour o he maerials. We recommend an expansion gap o a leas mm or lenghs o wo meres or more.The acousic elemens should be aached o he subconsrucion a mm inervals.Adequae venilaion o he rear o he acousic elemens is essenial o ensure climaic equilibrium.



3.7.1 WALL PANELLINgThe nal look o he nished insallaion is no only inuenced by he xing sysem seleced, bu also by he elemensize and is design specicaion. On he ollowing pages we would like o give you deails o jus a ew examples.

EXAMPLE 1 – WALL PANELLINg WITh A 10 mm gAPSubconsrucion: Verical wooden baens; max.spacing beween baens , mm; meal Zsuspension

rail mm; max. spacing beween rails mm; shadow gap proles in melamineaced board.

Elemen xing sysem: rebaed chipboard baensElemen specicaion: edged all round, mm ABS edge banding, Gap mmFinish a skiring level: shadow gap wih melamine aced board

Depending on he required acousicsound absorpion coecien values,he subconsrucion may or may noinclude sound aenuaion maerial.

3.73.7.1 A


m a x . s p a c i n g 5 0 0 m m

Detail B

Detail A

Suspension profile70/18 mm

Z-rail3,000/50/21 mm

Detail A Detail B

2 mm

ABS

edging

21

18

max. spacing 1,000 mm

squared timber 60/40 mm

10



EXAMPLE 2 – WALL PANELLINg WITh A 5 mm gAP

Subconsrucion: Meal Zsuspension rail mm; max. spacing beween rails mm.Elemen xing sysem: rebaed chipboard baensElemen specicaion: edged all round and grooved, mm ABS edge banding; visible wooden biscui; mm gap.Finish a skiring level: : shadow gap

Detail B

Detail A


Z-rail

3,000/50/21 mm

m a x . s p

a c i n g 5 0 0 m m

Detail A Detail B

2 mm

ABS

edging



EXAMPLE 3 – BUTT JOINTED WALL PANELLINg

Subconsrucion: Suppor prole; max. spacing , mm apar; Meal Zsuspension rail mm;max. spacing beween rails mm.

Elemen xing sysems: rebaed chipboard baensElemen specicaion: edged all round and grooved, mm ABS edge banding; concealed wooden biscui;

bu joinFinish a skiring level: shadow gap

max. spacing 1,000 mmReinforcement profilewith mounting bracket3,000/50/40 mm

Detail A Detail B

2 mm

ABS

edging

Detail B

Detail A


Z-rail

3,000/50/21 mm

m a x . s p

a c i n g 5 0 0 m m




EXAMPLE 4 – hAT PROFILE WITh vISIBLE LAMINATE INLAy AS DESIgN FEATURE

DETAIL – EXTERNAL CORNERS

Example o exernal corners on miered ProAcousic Classic wih mm ABS edge banding.



ALTERNATIvE SOLUTIONS FOR SUB-CONSTRUCTION AND FIXINg SySTEMS

As already menioned, here are many dieren alernaive soluions available rom a variey o manuacurers such as:

Suckow & Fischer Syseme GmbH & Co KG Häele GmbH & Co KGWaldsrasse Posach Biebesheim NagoldGermany Germanyt + () t + () f + () f + () www.suckowscher.de www.haeele.de

O course, i is also possible o use a proprieary consrucion.

ProAcoustic element

Rebated wooden

batten

Rebated wooden

batten

Rebated metal

batten

Rebated metal

batten




3.7.2 PARTITION WALLS

Room acousics and building acousics requenly clash in his eld o applicaion since pariion walls need o bespecially consruced in order o mee he requiremens o sound insulaion and sound absorpion in equal measures.Sound insulaion deals wih he abiliy o building componens o keep he sound ransmission beween wo rooms ahe lowes level possible. Sound absorpion on he oher hand describes he abiliy o maerials o absorb sound or respecively o aenuae he inciden sound energy.

For deailed inormaion on he undamenals o room acousics please reer o Chaper ”The ABC’s o Acousics”.

For he consrucion o pariion walls, our sound absorbing panels can be inegraed ino he sysems o many pariionwall manuacurers, bu hey can also be incorporaed in special, cusombuil srucures. In hese applicaions, hebasic srucure o he wall pariion elemen assumes he uncion o a room dividing, sound ransmission reducingbuilding componen. The inegral sound absorbing elemens provide opimum sound absorpion.

Please conac us during your early planning sages – we shall be pleased o advise you on his complex subjec inerms o acousics as well as consrucion.



3.7.3 CEILINgS

For he insallaion o ceiling sysems, crieria similar o hose or wall panelling sysems apply. In oher words,his eld o applicaion is also well covered by a large selecion o dieren xing sysem suppliers such asSuckow & Fischer or Häele or example.

EXAMPLE 1: CEILINg SySTEM 200 SUCKOW & FISChER

EXAMPLE 2: BALL IMPACT RESISTANT CEILINg SySTEM 270 SUCKOW & FISChER

EXAMPLE 3: BALL IMPACT RESISTANT CEILINg SySTEM 280 SUCKOW & FISChER

3.7.23.7.3 A




3.7.4 FURNITURE COMPONENTS

Individual soluions are in grea demand or urniure componens. A muliude o dimensions, individualypes o consrucion and ings, as well as special echnical characerisics all need o be aken ino accoun.As already menioned under poin ., dependen upon climaic condiions and componen size, ariculaedurniure componens such as hinged and sliding doors can show signs o dimensional change or disorion.These poenial dimensional changes can be minimised and/or correced wih he use o ulllengh handleproles and/or alignmen ings.

EXAMPLE 1: hINgED DOOR WITh FULL-LENgTh hANDLE PROFILE



Componens o > mm should be ed wih alignmen ings o counerac possible disorion. Suiablealignmen ings, as well as handle proles are available rom Häele, Würh ec. Our srengh lies in aeniono deail and our abiliy o supply you wih bespoke urniure componens. For your edge banding requiremenswe are pleased o oer as par o he EGGER ZOOM® Collecion decormached ABS edging ape o complemenour melamine aced chipboard.

EXAMPLE 2: SLIDINg DOOR WITh ALIgNMENT FITTINgS


Flush-fitting on reverse (example)

Aligment fitting for sliding doors

Boss

Tensioner

Boss

Alignment of a door by

pull and push force at

the turn of the tensioner.

Threaded rod

Retaining plate

Threaded rod

Retaining plate


http://slidepdf.com/reader/full/room-acoustic-solutions 42/70Peer Barenbach, München




Steel wire suspension

Elevation

Ceiling baffleVariable dimensions and

perforation patterns

Vertical section

EXAMPLE 2: CEILINg CLOUD

Variable dimensions and perforation patterns

View from below

View from above

Construction detail

Steel wire suspension

3.7.5 RETROSPECTIvE INSTALLATIONS

These acousic soluions, which are inended or rerospecive insallaions, are oered as preabricaed sysemcomponens. However, he reedom o choice in erms o dimensions, peroraions and decors also applies ohese sysem soluions.

EXAMPLE 1: CEILINg BAFFLE



4. CASE STUDIES

4.1 SAP STAFF RESTAURANT WALLDORF – GERMANy



4.4.14.2 C

A S E S T U D I E S

4.2 SPARKASSE GEVELSBERG – GERMANy



4.3 BIOMEDICAL CENTRE OF THE UNIVERSITy HOSPITAL BONN– GERMANy



4.34.4 C

A S E S T U D I E S

4.4 RITTAL ARENA WETzLAR – GERMANy



5. THE ABC’S OF ACOUSTICS

5.1 ROOM ACOUSTICS VERSUS BUILDING ACOUSTICS

The dierence beween he elds o room acousics and building acousics becomes obvious only when we ake acloser look a acousical quesions. In building acousics, he quesion always is:

→ What portion of the sound reaches the other side of the component in question?

The key propery is he sound insulaion o he componen. Essenially, i is abou he abiliy o componens– walls, ceilings, doors, windows, ec. – o minimise he sound ransmission beween wo rooms. A highdegree o sound insulaion is usually achieved using solid, heavy componens which hinder he propagaiono sound.

The airborne sound insulaion o building componens is characerised by he weighed building sound reducion index

R’w, a single number quaniy which is calculaed wih he aid o a raing curve rom he requencydependen buildingsound reducion measuremen R’. The R’w raing o an elemen can be deermined “in siu” by measuremens or bymahemaical model calculaions. Sound insulaion improvemens can be achieved by a variey o dieren reamens.

Background noise level

Buildin acoustics:

Sound transmission between

adjacent rooms

Transmied

sound level

Sound levelSound level

0 dB

0 dB

In room acousics, on he oher hand, he quesion is:

→ What surfaces help to create optimum listening conditions in a room?

The key propery in his case is he sound absorpion provided by he suraces o he maerials used in he room.Sound absorpion describes he abiliy o maerials o absorb sound or o conver he inciden sound energy inooher orms o energy. Sound absorpion is achieved by means o sound absorbers .

Room acoustics:

Acoustic qualit witin a room

Background noise level



5.5.15.25.2.1 T

h E A B C ’ S O F A C O U S T I C S

The sound absorpion o a surace is dened by he requencydependen sound absorpion coecien αs or, alernaively,by a simplied averaged sound absorpion coecien such as αw. The sound absorpion coecien o acousicallyeecive suraces is usually deermined by measuremens aken in specialised laboraories, reerred o as reverberaionchambers.

The erms “sound insulaion” and “sound absorpion” are welldened and relae o he elds o building acousics androom acousics respecively. I we eel annoyed by noise rom an adjacen room, increasing he sound insulaion o heboundary componen essenially helps o improve his siuaion.

In principle, sound absorpion in a room can only marginally conribue o increase he level dierence beween rooms,as par o he sound is already absorbed by he room where he noise is generaed and also by he room where henoise is experienced and his has an inuencing eec on how he sound level is perceived. Hisorically, he soundlevel reducion eec provided by sound absorbing – or acousically eecive – reamens is subsanially less hanhe resul ha can be achieved wih a building acousical opimisaion o he dividing boundary elemen.

5.2 FUNDAMENTALS OF ACOUSTICS

5.2.1 SOUND

Sound can comprise harmonious ones, music, bangs, noise, crackling, bu also spoken words. All o hese soundevens cause a sligh variaion in air pressure which propagaes wihin he surroundings o is source. We hereorereer o he sound pressure o a one, o noise, speech or music. The louder he sound even, he greaer is his pressurevariaion and he higher is he sound pressure. As a rule, sound always propagaes ino all hree direcions o space.Wih many sound sources he sound radiaion depends on he orienaion o he source; in mos cases i is sucien,however, o assume roughly a uniorm, omnidirecional sound radiaion. Sound sources o his ype are reerred oas omnidirecional sound sources. A sound wave is he recurring emporal and spaial variaion o air pressure or isrespecive densiy. Sound waves ravel hough a medium such as air and oher gasses, liquids such as waer or solidmaers, or example sones. For his reason, we diereniae beween airborne, uidborne and srucure noise. In very

general erms, sound can be dened as he propagaion o pressure and densiy variaions hrough an elasic medium:gasses, liquids, solid maers. When sound peneraes hrough a wall or oher consrucion componen, he incidenairborne noise is convered ino srucure noise (vibraion o he wall) and subsequenly, he airborne noise is reecedon impac wih he vibraing wall.

Sounds which are undesired by he recipien are commonly reerred o as noise. This deniion clearly shows he highlysubjecive naure o noise percepion. Psychoacousics, a eld o acousics, and noise eec research boh sudy heconnecion beween he subjecive human percepions o sound and he acually presen objecively discernible soundsignals. They diereniae beween waned sounds – music in a concer or voices during a conversaion – and unwaned,annoying sounds – rac noise or a neighbour’s music.



5.2.2 SOUND PRESSURE

Variaions in air pressure are reerred o as soundpressure. I is hereore possible o deermine herespecive air pressure o any sound even, wheher i be a single one, a sound, a noise, speech or music.The louder he sound even, he greaer are hepressure variaions and consequenly he higher ishe sound pressure. Minor sound pressure variaionsare perceived as quie sounds or noises. The humanaudiory sysem is able o perceive a minimal soundpressure o 2 μPa = .2 Pascal. Tha is a verylow value and demonsraes he sensiiviy o hehuman ear. On he oher hand, exposure o soundpressures o 2 Pascal, even or a very shor periodo ime only, can lead o permanen damage.

Time (sec.)

Sound pressure expressed in Pascal

5.2.3 SOUND PRESSURE LEvEL AND DECIBEL SCALE

Sound level, or sound pressure, is usually expressed as sound pressure level, or sound level in shor. In he deniiono he decibel scale, a sound level o decibels was se as being he hreshold o sound pressure percepion o heaverage human audiory sysem. The decibel is dened as a logarihmic uni o measuremen which expresses hesound pressure level. This provides us wih a scale o beween decibel (abbr.: dB) and 2 – dB. Exposure over long periods o ime o uninerruped noise rom dB onwards, or exposure o2 dB and higher in insances o veryshor sound evens (a loud bang), can lead o irreversible hearing damage.

Decibel

intolerable

er loud

loud

quiet

er quiet

inaudible

aircrat enine

rock concert,pneumatic drill

tickin watc

breatin

wisperin

140 dB A

120 dB A

100 dB A

0 dB A

0 dB A

40 dB A

20 dB A

0 dB A

loud communication,bus oce

normal communication,communication in a low oice

perect silence

ea trac

* Deinition see pae

*



5.2.25.2.35.3 T


5.3 SOUND PRESSURE INCREASE FOR MULIPLE SOUND SOURCES

An increase in he number o sound sources by a acor o wo always resuls in an increase o he level by dB,a acor o en in an increase by dB, and a acor o one hundred in an increase by 2 dB.

SOUND PRESSURE INCREASE FOR IDENTICAL SOUND SOURCES

The able below oers a simplied rule o humb or he addiion o wo level readings.Firs o all, he dierence beween he wo levels has o be esablished.

Example: For wo sources o 5 dB and 52 dB respecively, he dierence o 7 dB resuls in an increase by dB,which is added o 52 dB and hus equaes o a oal level o 5 dB.

Number o idenical sound sources Acousic power Sound pressure Sound level

× 100 × 1 + 2 dB

× 10 × 3.2 + 1 dB

× 4 × 2 + dB

× 2 × 1.4 + 3 dB

× 1 × 1 0 dB

Increase in sound pressure level by muliplicaion o number o idenical sound sources.

Example alarm clock Increase o dB value

dB

+ 3 = dB

+ = dB

+ = 8 dB

+ = dB

+ 10 = dB

+ 1 = 4 dB

+ 13 = dB

+ 1 = dB

+ 0 = 8 dB

Leel dierence between two leels 0 o 1 o 3 4 o more han 10

Leel increase to be added to te larer alue + 3 dB + dB + 1 dB + 0 dB



5.4 FREQUENCy

Frequency indicaes he number o sound pressure changes or vibraions per second. In ormulae, heleer denoes requency and Hz he uni Herz. A requency o Hz equaes o vibraions per second. Sound pressure or sound level respecively, is perceived as he volume o sound and hereorerepresens an imporan characerisic o sound. Equally imporan is he requency composiion o hesound, i.e. is specrum. Pure ones are sound evens o a single requency. The superposiion o oneso dieren requencies is reerred o as noise or sound, depending on he requency composiion.

The sensiiviy o he human audiory sysem is highly dependen on requency. I is paricularlypronounced in he requency range o human speech beween 25 Hz and 2 Hz. This is very useulwhen we lisen o someone speak, bu disrupions in his requency range are perceived as paricularlyannoying and can srongly aec communicaion. Wih oo high or low requencies, our hearing abiliydecreases.

A noise loudness raing which mees he demands o he human audiory sysemneeds o ake ino accoun he requency characerisic o he human audiory

sysem. When a oal level is accumulaed ou o he specrum, he mediumrequencies, a which he human audiory sysem is paricularly sensiive, areweighed more heavily han he high and low requencies. This weighing resulsin he erm dB(A) or sound pressure levels, i.e. he socalled Aweighed soundpressure level.

Nearly all regulaions, guidelines, sandard values, limi values, recommendaionsand reerences o sound pressure levels use values expressed in dB(A).

Inrasound Audible Rane [ 2 – 2 Hz] Ulrasound

Frequencies measured in hert h

0 Hz 00 Hz ,000 Hz 0,000 Hz 00,000 Hz

Ba

Triangle

Organ

Violin

Conrabass

Grand Piano

Male Voice

Female Voice

Telephone



5.45.55.6 T


5.5 FREQUENCy RANGES RELEVANT TO ROOM PLANNING

The requency range o be aken ino accoun when planning a room is based on he human audiory sysem onhe one hand and wha is echnically sensible and easible, on he oher. Basically, acousic planning should alwaysconsider hose requencies o sound ha are relevan o people. Frequencies above 5 Hz are aenuaed by heair o such a degree ha i is no sensible o ake hem ino accoun when planning he acousics o a room. Below Hz, oher physical implicaions o sound propagaion need o be aken ino accoun.

The inernaionally sandardised es mehods or deermining he sound absorpion by paricular maerials arebased on he requency range rom Hz o 5 Hz. Correspondingly room acousic planning ocuses on hisrequency range as a rule.

In rasound Hz] Ulrasound

Releant Frequenc Ranes

0 Hz 00 Hz ,000 Hz 0,000 Hz 00,000 Hz

aB

Organ

Vio i

ass

PianoGra

Ma e Voic

Fema e V

e ep one

Triang e

Audible Rane [ 2 – 2.

Conra

oice

Releant requencrane or roomacoustics rom100 h to 5000 h

5.6 WAVELENGTHS OF SOUND

Each requency o sound is associaed wih a sound wave o a paricular wavelengh. In air, a Hz wave has anexension o . meres, whereas a 5 Hz wave has an exension o only abou 7 cenimeres. Accordingly, hesound waves relevan or room acousics have a lengh o beween .7 m and . m. As we can see, he dimensionso sound waves are well wihin he range o he dimensions o rooms and urnishings.

Waelentλ

λ

λ

Time (sec.)

Sound pressure expressed in Pascal



5.7 LEVEL VALUES

The relevan parameer or an objecive assessmen o he noise impac a a work saion is he socalled raing level,which consiss, on he one hand, o he measured, imeaveraged sound pressure level in a room and, on he oher hand, o adjusmens in accordance wih he characerisic o he noise as well as is duraion o impac.

The raing level is usually based on a raing period o hours during which i is normally sucien o capure shor,represenaive periods o ime. High background noise levels impair concenraion and aec he inellecual eciency.For his reason, several regulaions and sandards conain recommendaions in erms o maximum permissiblebackground noise level.

Te ollowin table sows te recommended backround noise leel aluesin accordance wit DIN EN 1190:

Conerence room Individual oices Openplan oices

dB (A)

00

50

dB(A) dB(A)

dB(A)

dB(A)

Indusrialworkplaces

5.8 ROOM ACOUSTIC PARAMETERS

5.8.1 REvERBERATION TIME

The reverberaion ime orms he basis o raing room acousic condiions in a room. Pu simply, he reverberaion imeindicaes he period o ime i akes or a sound even o become inaudible. In echnical erms, he reverberaion ime T has been dened as he ime required or he sound pressure level in space o decay by 6 dB. This means ha, i a roomis excied wih a bang o 95 dB, he reverberaion ime indicaes he period o ime wihin which he noise level drops o5 dB. This can be a ew enhs o a second up o several seconds. The reverberaion ime can be deermined or eachenclosed space.



5.75.85.8.1 T


As reverberaion ime can be measured objecively, i is possible o compare a large varieyo rooms and o evaluae heir room acousical qualiy.The ollowing are ypical reverberaion imes or dieren ypes o room:

The reverberaion ime direcly inuences inelligibiliy wihin a room. In general erms, inelligibiliy wihin a roomdeerioraes as reverberaion ime increases. This, however, does no mean ha he shores reverberaion ime is alsohe bes reverberaion ime. As a rule, a very poor inelligibiliy would indicae ha he reverberaion ime is oo long.The subjecive impression o he sound qualiy o a room allows even a layperson o draw conclusions as o how hereverberaion ime progresses wihin he dieren requency ranges. For his ask, he ollowing able will prove o be

o assisance.

I, or example, speech in a room sounds blurred and i i is very di cul o undersand each oher, i can be assumedha he reverberaion ime is oo long. Acousically “dry” in his conex means ha he sound is absorbed unnaurallyas. I his happens only a high requencies, he room sounds “hollow” or “booming”, whereas a low requencies isounds “piercing” and “sharp”.

Reerberation Time

0 .0 2. Time (sec.)

Typical reverberaion ime or o ces: .5 – . sec.

Reerberation time: 1.8 sec.

6 dBA

00

50

Expressed in decibelsSound Level

Tpe o room Reverberaion ime (example)

Curc approx. 4 – 8 seconds

Medium sied class room 0. seconds

Oice – dependin on sie 0. – 0.8 seconds

Concert all or classical music approx. 1. seconds

Eent Reverberaion imea low ones

Reverberaion imea high ones

Subjecive Impression

Speec oo longoo longoo shor

oo shor

oo longoo shoroo long

oo shor

blurred, diicul o undersandhollow, bu easy o undersandpiercing, sharp, possibly hissing noises, diicul oundersand

dry, bu easy o undersand

Music oo longoo longoo shoroo shor

oo longoo shoroo longoo shor

blurred, “wavy”unnaurally hollow, possibly boomingblaring o piercingdry, wishywashy



The reverberaion ime depends mainly on hree acors: he volume o he room, he suraces andhe urniure and xures in he room.

Basically, he ollowing applies:→ The larer he room, he loner is usually he reverberaion ime.→ The more absorpion here is in a room, he shorer is he reverberaion ime.

A room usually becomes more reverberan wih increasing heigh. Absorbing suraces – such ascarpes, curains and sound absorbing ceilings, bu also urniure or people presen in he room –reduce he reverberaion ime.

0 0.5 . .2 Time (sec.)

Reerberation time: 0.5 sec. WITh EggER products

Reerberation time: 1.2 sec. WIThOUT EggER products

00

50

Sound levelin decibels



5.8.1 T h E A B C ’ S O F A C O U S T I C S

A undamenal ask o room acousic planning is o achieve a good balance beween he wo quaniies volumeand absorpion area. The second sep involves he opimum posiioning o reecing and absorbing suraces inhe room. The shape o a room is usually o minor imporance in erms o reverberaion ime. Only i he roomacousic requiremens are very high (e.g. in concer halls) or i he shape is very unusual, e.g. vauled suraces,or i here are signicanly varying room heighs, does shape become an essenial acor.

The recommendaions and direcions given in DIN should always orm he basis o any room acousicplanning. In erms o opimum reverberaion ime, DIN disinguishes beween hree dieren roomcaegories: “music”, “speech” and “communicaion and eaching”. Communicaion inensive areas such asmeeing rooms, conerence rooms or muliple occupancy oces should be reaed in accordance wih caegory“Communicaion and eaching”.

→ Two examples

Example A conerence room (usage ype: “communicaion and eaching”) wih a volume o 25 m³ should have a reverberaionime o .6 s.

Example 2A chamber music hall (usage ype: “music”) wih a volume o 55 m³ should have a reverberaion ime o . s.



5.9 SOUND ABSORPTION

The sound absorpion coecien α describes he propery o a maerial o conver inciden sound ino oher ormso energy – e.g. hermal or kineic energy – and hus o absorb i.

Illusraion : Sound compleely absorbed and no reecion – sound absorpion coecien α =

The oher exreme is where sound is compleely reeced. The inciden sound is reeced by a wall, or example,and prevened rom propagaion.

Illusraion 2: Sound compleely reeced – sound absorpion coecien α =

Illusraion : Sound parially absorbed – sound absorpion coecien α = beween and

Perec sound absorpion

Perec sound reecion

Parial sound absorpion

The sound absorpion coecien α o a maerial is highly dependen on requency. I is hereore necessary o also viewhe absorpion eec o maerials as being requencydependan. The requencydependen sound absorpion coecien o a maerial is deermined by means o a special acousic maerial es – he socalled reverberaion room mehod. For hises, a maerial sample is placed ino he reverberaion room, whose reverberaion ime has been deermined previouslywihou he sample. From he change in he reverberaion ime wih he sample presen in he room, he sound absorpioncoecien αs (“Alpha Sabine”) can be deermined or each onehirdocave beween Hz and 5 Hz. This yields onehirdocave values which uniquely describe he absorpion behaviour o he maerial, i.e. o wha exen and a wharequencies he maerial absorbs he sound.

When solving room acousic problems wih he aid o merological mehods, a resoluion in onehirdocave inervalsshould always be chosen, as many acousic problems occur wihin small requency ranges and, accordingly, requireprecisely ailored soluions.



5.9 T h E A B C ’ S O F A C O U S T I C S

Onetirdoctae and octae centre requencies

0 Hz 00 Hz ,000 Hz 0,000 Hz 00,000 Hz

Onetirdoctae and octae centre requencies h,

Sequence o onetirdoctae centre requencies

Onehirdocave i nerval Ocave i nerval

riangle

Audible Rane [ 2 – 2.

Conrab

oice

Inrasound

Male Voice

Female V

Releant requencrane or roomacoustics rom

100 h to 5000 h

, , , , , , , ,

However, i is no only he choice o maerial ha is responsible or he sound absorpion in a room.The decisive acor is he oal area o his maerial presen in he room. The quaniy equivalen soundabsorpion area was inroduced o provide a measure or he sound absorbing perormance o a soundabsorber. I is dened as he produc o he sound absorpion coe cien αs o a maerial and hesurace o his maerial.

The equivalen sound absorpion area can be calculaed by muliplicaion o he sound absorpioncoe cien by he surace area o he maerial in quesion. I his surace area is doubled, hen hesound absorpion coe cien doubles as well.

Calculaion o he equivalen sound absorpion o suraces in a room:

A = s₁ α₁ + s₂ α₂ + s₃ α₃ + … + sn + αn + A₁ + A₂ + … + An

A – oal equivalen sound absorpion area in a rooms₁ – size o surace area o maerial , e.g. acousic ceiling

α₁ – sound absorpion coe cien o maerial s₂ – size o surace area o maerial 2, e.g. ed carpeα₂ – sound absorpion coe cien o maerial 2 …A₁, A₂, … equivalen sound absorpion coe cien o xures and ings (such as chairs, ables, cabines .... )

Hz] Ulrasound

B

Organ

Violi

ass

d PianoGra

Telephone



5.10 SOUND ABSORPTION AND REVERBERATION TIME

In a ully urnished room wih dieren suraces, each maerial (e.g. carpes, plaser, acousic ceiling, curains,windows, shelves, ec.) can be allocaed a sound absorpion coecien and by muliplying his coecien byhe acual surace area o his maerial, he equivalen sound absorpion area can be calculaed. The equivalensound absorpion areas o all maerials are hen added o deermine he oal equivalen sound absorpion areao he room. I he room volume is known, he reverberaion ime can be calculaed very quickly wih he socalledSabine reverberaion equaion which provides a ormula ha is based on hree parameers only: he equivalensound absorpion area, he room volume and he reverberaion ime.

Sabine ormula:

T – Reverberaion ime

V – Volume o he roomA – Toal equivalen sound absorpion area in he room

Even a sound absorber wih a high sound absorpion coecien does no achieve he desired eec in he roomunless a cerain surace area is consruced o i. On he oher hand, a sound absorber wih a relaively lowabsorpion coecien can also achieve he desired eec, as long as he surace area seleced is large enough.Essenially, room dampening can be achieved wih eiher a single sound absorber or even a combinaion o manydieren sound absorbers. The decisive acor or he reverberaion ime o a room is always he oal sum o allequivalen sound absorpion areas.

5.11 RATING OF SOUND ABSORPTION

Saemens are available on he basic suiabiliy o sound absorbers or paricular applicaions and provide simpliedsingle number raings in erms o sound absorpion coecien. Whils hey may no permi diereniaed planning, heydo allow rough comparisons o be made beween dieren sound absorbers. Such raings also enable he simpliedplanning o rooms wih low requiremens in erms o acousical qualiy. Agains his backdrop, single values o soundabsorpion have been dened in Europe and he US which dier slighly. The mos common single number value o soundabsorpion in Europe is he socalled weighed sound absorpion coecien αw, whereas in he Englishspeaking world i

is he Noise Reducion Coecien ( NRC ) or he Sound Absorpion Average ( SAA ).

All mehods used or he deerminaion o he single number value are based on he onehirdocave values o he soundabsorpion coecien αs, which is measured in a reverberaion chamber. The mehods involved in he deerminaion o he single number values NRC, SAA and αw are described below.

Weighed sound absorpion coecien αw (DIN EN ISO 65): In order o deermine he weighed sound absorpioncoecien αw, he mean value or he ocave cenre requency beween 25 Hz and Hz is idenied rom hreeonehirdocave values. onehirdocave values are hus convered ino 6 ocave values. The mean value o herespecive ocave is hen rounded o he neares .5 and is reerred o as he pracical sound absorpion coecien α p.The pracical sound absorpion coecien αp beween 25 Hz and Hz is hen compared o he reerence curve givenin DIN EN 65. The reading o his comparison is he single number value o he weighed sound absorpion coecien αw.

T = 0.163 × vA



5.105.11 T


Deviaions by more han . beween he curve and he reerence curve are indicaed by meanso he shape indicaors L, M or H, depending on wheher hey occur a Hz (L), a Hz or Hz (M), or a Hz or Hz (H).The resuling values are, or example, αw = . (H), αw = . or αw = . (LM).

Based on he αw value, sound absorbers can be classied ino dieren sound absorber classes.αw values o more han ., or example, belong o sound absorber class A, values o beween. and . belong o class E.

Apar rom he widely used European weighed sound absorpion coecien αw (DIN ISO 65), hemos common single number raings in he US are NCR and SAA (ATMS 2). The NRC (Noise ReducionCoecien) is deermined by calculaing he mean value rom our onehirdocave values o he soundabsorpion coecien (25 Hz, 5 Hz, Hz and 2 Hz). The resul is hen roundedup exacly ohe neares .5. The SAA (Sound Absorpion Average) is deermined by calculaing he mean valuerom welve onehirdocave values o he sound absorpion coecien beween 2 Hz and 25 Hz.

The resul is hen roundedup exacly o he neares ..

ADVANTAGE OF SINGLE-NUMBER VALUES:Sound absorbers can be roughly classied and hereorecompared wih one anoher. For room siuaions whererequiremens are low, or example corridors or sales oors,i is perecly accepable o consul singlenumbered valuesin order o esimae he required absorber surace.

DISADVANTAGE OF SINGLE-NUMBER VALUES:

A singlenumber sound absorpion value always represensan exremely simplied value. Sound absorbers wih verydieren absorpion specra can have idenical singlenumber values. This may someimes resul in he use o a sound absorber which is no suiable or he exisingcondiions. Frequencies below 2 Hz are no aken inoaccoun. Consequenly i would be possible o choose asound absorber, whose sound absorpion below 2 Hzis so minimal, ha he room has a ‘booming’ acousicpaern on compleion.

Sound absorber class αs alue rane

A 0.0 – 1.00

B 0.80 – 0.8

C 0.0 – 0.

D 0.30 – 0.

E 0.1 – 0.

Not classifed 0.00 – 0.10



5.12 INDEx

EQUIvALENT SOUND ABSORPTION AREA

The equivalen sound absorpion area A is dened as heproduc o he sound absorpion coecien α o a maerialand he surace S o his maerial.

AURALISATION (PROCESS OF RENDERINgAUDIBLE)

Auralisaion is a mehod or simulaing he acousicproperies o a room. Wih his mehod, he eecs o cerain acousic reamens can be “auralised” as early asduring he design sage. Room acousic auralisaions can

be based on eiher simulaed calculaions o a compuer generaed virual room model or on measuremens akenin a real room. The process demonsraes, in advance,audiory condiions in a room and oers a more direccomparison beween dieren planning models han couldoherwise be achieved by comparing parameer values.

BUILDINg ACOUSTICSBuilding acousics is a branch o building physics, or acousics, which deals wih he eec o he srucuralcondiions on he propagaion o sound beween herooms o a building or beween he inerior o a room

and he ouside o he building.

RATINg LEvEL (Lr )The raing level Lr (L or “level”, r or “raing”) is he relevanparameer or objecively assessing he noise impac a aworkplace. Apar rom weighing he sound pressure levelas a uncion o he requency (see Aweighed soundpressure level), a deerminaion o he sound pressurelevel akes ino accoun cerain adjusmens which dependon he characerisic o he sound (e.g. impulsiveness or clear prominence o individual ones) and is duraion o

impac. The raing level is also expressed in dB(A).

SINgLE-NUMBER vALUES OF SOUNDABSORPTION

Socalled “singlenumber values” are used or a simpliedrepresenaion o he requencydependen parameer o he sound absorpion coecien, as well as or a roughcomparison o dieren sound absorbers. In Europe, he“weighed sound absorpion coecien” αw in accordance

wih DIN EN ISO 65 is commonly used. In he US, he NRCand SAA values are widely used. All o he above values arebased on measuremens o he sound absorpion in onehird ocave and ocave incremens. For a deailed acousicplanning o a room i is, however, necessary o know hesesound absorpion values precisely in onehirdocave or aleas in ocave incremens (see “ocaves”).

FREQUENCy Frequency indicaes he number o sound pressurechanges per second. Sound evens wih a high requency

are perceived by he human ear as highpiched ones,sound evens wih a low requency as lowpiched ones.Sounds such as noise, road rac, ec., normally comprisea grea number o requencies. The measuremen uni o requency is herz (Hz), Hz = /s. Human speech is in herange beween 25 Hz and 2 Hz. The audible range o human beings is beween 2 Hz and 2 Hz.

REvERBERATION ROOMReverberaion rooms are special laboraory rooms wihwalls which reec he inciden sound waves o a veryhigh degree. Reverberaion rooms have paricularly long

reverberaion imes across he enire requency range.

REvERBERATION ROOM METhODThe reverberaion room mehod is used or deermininghe requencydependen sound absorpion coecien.A sample o he maerial o be esed is placed ino hereverberaion room. The sound absorpion o a maerial canhen be calculaed rom he change in he reverberaionime o he room.

BACKgROUND NOISE LEvELUsually, sounds which do no conain any meaningulinormaion are reerred o as background noise (e.g. noiserom air condiioning or rac). The background noiselevel is measured in dB or, by weighing is requencies inaccordance wih he human audiory sysem, in dB(A).

DECIBEL (DB)A logarihmically dened uni o measuremen whichexpresses he sound pressure level. The relevan scaleor human beings is dB o dB. dB reers o asound pressure o 2 µPa.

A-WEIghTED SOUND PRESSURE LEvEL –DB(A)

The Aweighed sound pressure level is he weighedaverage value o he sound pressure level (dB) as a unciono he requency o a sound. The weighing akes inoaccoun he abiliy o he human audiory sysem o perceive sound pressure levels or ones o dierenrequencies o a dieren degree. This sensiiviy isparicularly pronounced in he medium requency range,i.e. he range o human speech. Nearly all regulaionsand guidelines indicae values expressed in dB(A).



5.12 T h E A B C ’ S O F A C O U S T I C S

ACOUSTIC QUALITy The acousic qualiy o a room reers o is suiabiliy or a paricular use. I is inuenced by he properies o heboundary suraces (walls, ceiling, oor), he xures andings and by persons presen in he room.

NOISENoise comprises all sounds which, due o heir loudness

and srucure, are considered as harmul or annoying or sressul or human beings and he environmen. I dependson he condiion, preerences and mood o a person wheher sounds are perceived as noise or no. The percepion o sounds as noise and he way in which people are aecedby i depend, on he one hand, on physically measurablequaniies such as he sound pressure level, pich o a one,onaliy and impulsiveness. On he oher hand, cerainsubjecive acors also play a role: a bedime noise isperceived as exremely annoying. The same is rue or aciviies which require a high level o concenraion. I welike cerain sounds, we will no perceive hem as annoying

even a high volumes; sounds which we do no like areannoying o us even a low volumes (e.g. cerain ypes o music). Furhermore, how we eel a a paricular ime alsoinuences our sensiiviy o noise. I an aciviy is disrupedor disurbed by one or more sounds, his is reerred o asnoise polluion. We are paricularly sensiive o noise i verbal communicaion is aeced, e.g. i a loud conversaiona he neighbouring able makes i dicul or us o lisen,and i we have o concenrae or wan o sleep.

REvERBERATION TIMEPu simply, he reverberaion ime indicaes he period

o ime i akes or a sound even o become inaudible. Inechnical erms, he reverberaion ime T has been denedas he ime required or he sound pressure level in spaceo decay by 6 dB.

OCTAvE BANDSAcousic parameers such as he sound pressure level or he sound absorpion coecien are usually expressed inincremens o ocaves and onehirdocaves. The preciseknowledge o acousic properies in he smalles possiblerequency seps o sound is a prerequisie or a deailed

acousic design. For room acousics he relevan ocaverequencies are 25 Hz, 25 Hz, 5 Hz, Hz, 2 Hzand Hz. The ocave incremens are obained bydoubling he previous requency. Each ocave compriseshree onehirdocave values (see also “single values”).

POROUS ABSORBERSPorous absorbers comprise, or example, mineral bres,oams, carpes, abrics, ec. The eec o he porousabsorbers is due o he ac ha sound is able o ener heopen srucures o he maerial where, by he ricion o air paricles, he sound energy is convered ino hermalenergy a he surace o he pores. Porous absorbersachieve heir bes eec a medium and high requencies.

PSyChOACOUSTICSA branch o acousics or noise eec research which dealswih he subjecive percepion o objecively presen soundsignals. Furhermore, psychoacousics sudies he inuence

o a lisener’s personal aiudes and expecaions on hepercepion o sound evens.

RESONANCE ABSORBERThis erm comprises all ypes o absorbers using aresonance mechanism such as an enclosed air volumeor a vibraing surace. Resonance absorbers are mainlysuiable or absorbing sound o medium o low requencies.The maximum eec o resonance absorbers is usuallyresriced o a cerain requency range (see also “porousabsorbers”).

SOUND ABSORBERSSound absorbers are maerials which aenuae incidensound or conver i ino oher orms o energy. A disincionhas o be made beween porous absorbers and resonanceabsorbers or combinaions o hese absorber ypes.

SABINE FORMULAI he volume and he oal equivalen sound absorpionarea o a room are known, he reverberaion ime can beesimaed using he Sabine ormula, where “T” is he

reverberaion ime, “V” is he volume o he room and “A”is he oal equivalen sound absorpion area. The closerelaionship beween he volume o a room, he soundabsorpion o he suraces o his room, and he reverberaion ime was discovered by he physicis Wallace ClemenSabine (6 – 99). He uncovered ha he reverberaionime T is proporional o he room volume V and inverselyproporional o he equivalen sound absorpion area A:T = .6× V / AThe equivalen sound absorpion area A is he sum o allsuraces S presen in he room, each muliplied by iscorresponding sound absorpion coecien α:

A = αS + α2S2 + αS + … + αnSn

The background noise level indicaes he sound pressurelevel which has been exceeded during 95 % o he measuremen period. I has a direc eec on speech inelligibiliy.



SOUND ABSORPTION COEFFICIENT αThe sound absorpion coecien α o a maerial indicaeshe amoun o he absorbed porion o he oal incidensound. α = means ha no absorpion occurs; he enireinciden sound is reeced. I α = .5, 5 % o he soundenergy is absorbed and 5 % is reeced. I α = , he enireinciden sound is absorbed, here is no longer anyreecion.

SOUND ATTENUATIONSound aenuaion describes he abiliy o maerials oabsorb sound or o conver he sound energy presen inooher orms o energy, i.e. ulimaely ino hermal energy(see also “sound insulaion”).

SOUND INSULATIONSound insulaion reers o he resricion o hepropagaion o sound hrough he boundaries o a room.Sound insulaion is, hereore, a measure o separaerooms acousically rom unwaned sound rom adjacenrooms or he ouside. This has nohing o do, however,wih he required acousic sound aenuaion wihin aroom (see also “sound absorpion”). Sound insulaionis a undamenal parameer o building acousics.A disincion has o be made beween airborne sound

insulaion and impac sound insulaion. Airborne soundis creaed by sound sources presen in he room which areno immediaely conneced o he boundary suraces, e.g.people who are alking. Impac sound, on he oher hand,resuls rom srucureborne sound (ooalls, knocking),which in urn excies he walls or ceilings o radiaeairborne sound. Airborne sound insulaion and impacsound insulaion boh have o ull he requiremensesablished in relevan building laws.

SOUND PRESSUREAll sound evens have in common he ac ha hey cause

sligh variaions in air pressure which can propagae inelasic media such as air or waer. We hereore reer ohe sound pressure o a one. The heavier he pressurevariaions are, he louder is he sound even. The aser he variaions occur, he higher is he requency.

SOUND EvENTSGeneral erm or ones, music, bangs, noise, crackling, ec.

SOUND ShIELDINgA sound shield is basically an obsacle which inerrupshe direc propagaion o sound rom a source o areceiver. I can consis o a movable pariion or anaachmen o be placed on op o a desk. Cabines andoher largesurace pieces o urniure can also uncionas sound shields. Sound shields can be provided wih asound absorbing surace which addiionally reduces hepropagaion o sound.

SOUND SPECTRUMThe sound specrum describes he requency composiiono he sound. Pure ones are sound evens o a singlerequency. A superposiion o ones o dieren requenciesis reerred o as noise or sound.

SOUND WAvESVariaions in air pressure which are caused by soundevens are reerred o as sound waves. The lengh o he sound waves denes he requency and heir heighdenes he level. Long sound waves have a low requency

and are perceived as lowpiched ones. Shor soundwaves have a high requency and are perceived as highpiched ones. In air, a Hz wave has an exension o meres, whereas a 5 Hz wave has an exensiono approximaely 7 cenimeres.

SOUND MASKINgSound masking specically uses sounds, eiher naural(e.g. birds’ wiering) or aricial (e.g. noise) in order o blanke oher sounds. This mehod can be used, or example, o drown ou inormaionconaining soundsi he oher background noise is oo weak o mask hem.

SOUND PRESSURE LEvEL (LP )The sound pressure level (L or level and p or pressure)is a logarihmic quaniy or describing he inensiy o a sound even. The sound pressure level is oen alsoreerred o as “sound level”, which is acually no quie

correc. The sound pressure level is expressed in decibels(abbreviaed as dB). Sound pressures are measured usingmicrophones. The measurable level range sars a jusbelow dB and ends a approximaely 5 o 6 dB.



5. T h E A B C ’ S O F A C O U S T I C S

→ WE WOULD LIKE TO ThANK AKUSTIKBüRO OLDENBURg FOR ThEIR ASSISTANCE

In 2, he physiciss Dr. Caja Hilge and Dr. Chrisian Nocke ounded an acousic consuling company in Oldenburg, Germany. They work as specialised engineers or archiecs, exper winesses in cours and consulans inhe eld o acousics.Archiecural acousics or schools, oces and oher aciliies and he developmen o room acousic soluions

have become major ocus poins o he company.

→ ConacAkusikbüro Oldenburg, Kaharinensr. , Oldenburg, Germanyt+ , f+ , [email protected], www.akusikbuerooldenburg.de



6. SAMPLE SERVICE AND CONTACTS

6.1 PRODUCT PRESENTATION AND POINT-OF-SALE SUPPORT

AKUSTIC-BOX – EXPERIENCE ACOUSTIC QUALITy Our Acousic Box enables us o demonsrae o you all o he proven soluions as well as he new possibiliies. The AcousicBox consiss o wo single boxes or boohs wih he aid o which we are able o simulae a room amosphere wih eiher excessive or insu cien sound absorpion. Genuine acousic samples in a large variey o surace nishes serve o presenhe dieren peroraions and slo conguraions on oer. In addiion, we are displaying a number o simple, pracicalapplicaion suggesions.

I is oally inenional ha here is no sense o wellbeing on enering he Acousic Box as his emphasizes he imporanceand necessiy o good acousics. The reverberaion ime is he undamenal parameer or room acousics; in oher words,he acousic qualiy o a room can be measured and raed on he basis o he reverberaion ime.

To gain your rshand experience, our

Acousic Box is available a Brilon (DE),Waechersbach (DE) and S. Johannin Tirol (AT).

Individual Box : excessive sound absorpion –

very shor reverberaion ime

Individual Box : insu cien sound absorpion –

long reverberaion ime

Individual box dimensions: Widh m / Deph . m / Heigh . m

Acousic Box dimensions: Widh m / Deph . m / Heigh . m

Acoustic Box details



6.2 SAMPLES

6.6.16.26.3 S

A M P L E S E R v I C E A N D

C O N T A C T S

ACOUSTIC SAMPLE CASE

Our Acousic Sample Case is designed o aciliae mobile onsie presenaions. I conains seleced peroraionand slo conguraions, all uniormly presened in Decor F59.

hAND SAMPLES

A hand samples o seleced peroraions and slo paerns are available rom EGGER Brilon and S. Johann/Tyrol.These samples are available rom sock, bu only in dened decors as below.

Speciication Decor

Peroration ././. F0 ST Aluminium

Peroration //. F0 ST Aluminium


Peroration ././. H1 ST Ligh Lakeland Acacia

Peroration ././. H1 ST Ligh Lakeland Acacia


Slot Pattern Linear Micro H3081 ST Hacienda Black

Slot Pattern Linear Micro H3081 ST Hacienda Black

6.3 PARTNERS

Premises o Akusik+ in Wächersbach near Frankur, Germany

Akustikbro Oldenbur Kaharinensraße OldenburgGermanyt + () f + () [email protected]

akustik plus gmbh & Co. KgIndusriesraße WächersbachGermanyt + () / – f + () / – [email protected]



NOTES



s h o w n a r e r e p r o d u c t i o n s .

i g h t l y f r o m t

h e a c t u a l p r o d

u c t .

www.egger.com

EGGER Holzwerkstoffe Brilon

GmbH & C0. KGIm Kissen 19

59929 Brilon

Germany

+49 2961 770-0

+49 2961 770-62222

[email protected]

EGGER (UK) Limited

Anick Grange Road

Hexham, Northumberland

NE46 4JS

United Kingdom

+44 1434 602191

+44 1434 605103

[email protected]

FRITZ EGGER GmbH & Co. OG

Holzwerkstoffe

Weiberndorf 20

6380 St. Johann in Tirol

Austria

+43 50 600-0

+43 50 600- 10111

[email protected]

room acoustic solutions

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