Propagation of sound in residential buildings

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Content

1.Basics for outdoor propagation2.Indoor propagation sources.3.In detail indoor soundproofing techniques4. Requirements and regulations5. Example

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Map of noise pollution in Sofia city

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

External sources of noise

La,eq = 90 dB La,eq = 77 dB

La,eq = 85 dB La,eq = 84 dB

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Basic rules for position of buildings near to noise source

Rooms orientationOrientation of the premises

Bedroom premises are orientated in direction opposite to the sound sources

NO

YES

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Basic rules for external buildings elements near to noise source

Solidrailings

Sound absorbing ceiling

Maximalshiftedwindows

Transparentbarriersin lowfloors

High index ofSound insulation of the facade elements

NO

YES

Traffic

Traffic

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Internal sources of noise

Lp = 76 dB

Lp = 99 dB

Lp = 71 dB

Lp = 71 dB Lp = 68 dB

Lp = 94 dB Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Ways of propagation of sound in buildings

Direct sound transition

Flanking ways of sound transmission

Sound transmittedby installationopenings between floors

Standard describing the methodology for calculation of bypass roads: EN 12354

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Index of sound insulation of partition elements between two premises

Index of sound insulation of partition elements between two premises with elastic separated elements

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

The sound pressure in receiver room with loud speech

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Application of sound reduction system to direct element

Partition element from aerated concrete blocks with total thickness = 135 mm

The noise reduction system with thickness 72.5 mm :-50 mm air gap filled with 40 mm mineral wool-10 mm gypsum-faser board-12.5 mm gypsum board-Rubber hangers-Metal construction

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

The sound pressure in receiving room with loud speech

L2 = 41.2 dB(A)

Adding of sound reducing system to partition element d of side Of the reception premise

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

The sound pressure in reception premise with loud speech

L2 = 39.9 dB(A)

Adding of sound reduction system to partition element d, f1 and f2 from sideof receiving room

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Adding of sound reduction system to horizontal elements

Reinforced concrete plate with coat 150 mm

Sound reducing system with thickness: 72.5 mm -50 mm air gap filled with 40 mm mineral wool-10 mm gypsum -phaser board-12.5 mm gypsum board-Rubber hangers-Metal standers construction

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Sound pressure in receiving room with loud speech

L2 = 32.7 dB(A)

Adding of sound reducing system to partition element d, f1, f2, f3 и f4 from sideof reception premise

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Sound pressure in reception premise with loud speaking

L2 = 38 dB(A)

Partition wall d from dense ceramic brick with total thickness 260 mm

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

инж. Цветан Недков , УАСГ София 2014 г.

Regulations requirements for permissible sound pressure

инж. Цветан Недков , УАСГ София 2014 г.

Example distribution and kind of partition elements

СпалняДетска стая

АнтреБаня

Кухня

Дневна

Баня

Кухня

Кухня

Дневна

Баня

Спалня

Дневна

Баня

НЕ

ДА

Dense ceramic brick 12/25 sm

Aerocrete brick / Gypsum wall12 / 20 / 25 sm

Hollow ceramic brick / Termo insulation 25 / 38 см

Lining tape under walls

Антре

Minimal requirements for insulation of partition elements

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.

Thank you for your attention!

Tsvetan Nedkov, Ivaylo HristevUACG 2014 г.