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Matrix Acoustic Design Consultants

Proposed Broiler Breeder Egg Laying Units

Falsidehill Farm

Kelso

Roxburghshire

TD5 7TT

NOISE IMPACT ASSESSMENT

Acoustics Report M1965/R01

19th December 2019

To: By:

Ian Pick Associates Ltd Station Farm Offices Nafferton Driffield East Yorkshire YO25 8NJ Paul Smith BSc MIOA

Matrix Acoustic Design Consultants Noise Impact Assessment

19th December 2019 Page 1

1. Introduction

This acoustic report documents a noise impact assessment for proposed poultry units at Falsidehill Farm, Kelso; Figures 1 and 2.

The report is divided into the following sections:

• Section 2: Overview of the Development • Section 3: BS4142:2014 • Section 4: Background Noise Levels • Section 5: Noise Impact Assessment • Section 6: Conclusion • Appendix A: Calculations • Appendix B: Manufacturers fan noise data

2. Overview of the Development

The proposal is for four broiler breeder egg laying units at Falsidehill Farm, Kelso; Figures 1 and 2.

The closest dwellings, labelled A - C in Figure 1, are approximately between 740m – 840m from the proposed development.

For the noise impact assessment, the noise sources generated by the proposed scheme have been split into two categories, namely:

Plant noise: The only plant associated with the poultry units will be 14 x Big Dutcham FF091-6DT extract fans per shed, with ridge mounted ducts running the length of the units; Figure 1. Manufacturers data sheet for the selected extract fans is provided in Appendix B.

There will be an unobstructed noise path between extract fan duct terminations and Dwellings A- C.

Transport noise: Transport noise includes commercial vehicles manoeuvring and loading/unloading on the concrete aprons to the north and south of the poultry units; Figure 1. A forklift will be used for the loading/unloading of HGVs.

For the assessment it has been assumed that the activities occur on the concrete apron nearest to the dwelling with an unobstructed noise path.



Figure 1. Ariel view (source: www.bing.com) showing footprint of proposed poultry units and nearest dwellings

Proposed poultry units

Nearest dwellings

Concrete aprons

N

A

B

C

West elevation

South elevation

Ridge mounted extract fan ducts

Figure 2. West and south elevations of proposed poultry units



3. BS4142:2014

The noise assessment detailed in this report has been conducted in accordance of BS4142:2014 ‘Methods for Rating and Assessing Industrial and Commercial Sound’.

3.1 BS4142:2014

BS4142:2014 provides a methodology to assess the impact of industrial and commercial noise affecting dwellings, whereby the ‘typical’ background noise level is deducted from the industrial noise Rating Level (industrial noise corrected to account for the ‘on-time’ and noise character of the noise source; see sections 3.2 and 3.3 below). The following guidance is given based on the established difference:

• A difference of around +10dB or more is likely to be an indication of significant adverse impact, depending on context

• A difference of +5dB is likely to be an indication of an adverse impact, depending on context

• The lower the rating level is relative to the measured background sound level, the less likely it is that the specific sound source will have an adverse impact or a significant adverse impact. Where the rating level does not exceed the background sound level, this is an indication of the specific sound source having a low impact, depending on context

Context, as defined in BS4142:2014, includes the consideration of the following factors:

• The absolute level of the noise emissions • Character and level of the residual sound compared to the character and level of the

Specific Level • Sensitivity of the receptor and any acoustic design measures (e.g. façade sound

insulation, use of mechanical ventilation and acoustic screening) incorporated at premises used for residential purposes

Where background noise and Rating Levels are low, BS4142:2014 states that ‘absolute levels might be as, or more, relevant than the margin by which the rating level exceeds the background. This is especially true at night’. Low background noise and rating levels are not defined. However, in BS4142:1997 it states that ‘background noise levels below 30dB and rating levels below about 35dB are considered to be very low’.

3.2 On-time correction

To take account of industrial/commercial noise sources that do not operate continually an ‘on-time’ correction is applied using:

- 10 log (r/rref) Where:

rref. = reference time (1hr between 07:00 – 23:00hrs and 15 minutes between 23:00 – 07:00hrs)

r = total ‘on-time’ during the reference period

Note that the shorter reference time interval between 23:00 – 07:00hrs is designed to penalise industrial/commercial noise events that occur during the night.



3.3 Noise character correction

BS4142 provides four noise character correction categories with associated penalties that must be applied when determining the Rating Level, namely:

• Tonality: o Not perceptible = 0dB o Just perceptible = +2dB o Clearly perceptible = +4dB o Highly perceptible = +6dB

• Impulsivity: o Not perceptible = 0dB o Just perceptible = +3dB o Clearly perceptible = +6dB o Highly perceptible = +9dB

• Intermittency: +3dB if the intermittency of operation is readily distinctive against the residual noise environment

• Other: +3dB applied if the specific sound is neither tonal or impulsive but features noise characteristics that are readily distinctive against the residual noise environment

4. Background Noise Levels

A noise survey has not been undertaken to establish the existing background noise levels at the nearest dwellings. However, taking into account the rural location of the development together with the proximity of the local roads, the typical background noise levels are expected to be:

• Day (07:00 – 20:00hrs): LA90 35dB • Evening (20:00 – 23:00hrs): LA90 30dB • Night (23:00 – 07:00hrs): LA90 25dB

For the purpose of the assessment the above background noise levels, which are low, have been taken to be representative to the ‘typical’ background noise levels that will occur at the nearest dwellings.

5. Noise Impact Assessment

5.1 Source noise data

• Extract fans: o Type: Big Dutchman FF091-6DT o Sound Pressure Level: 50dB(A) at 7m, 45° lateral; see Appendix B for

manufacturers data sheet o Total number of units: 14 per shed o Duct locations: ridge mounted ducts with terminations at 6.1m above local

ground

• Transport: source levels derived by measurements made by Matrix Acoustics during poultry catching at Parton Poultry Farm, Herefordshire on 9/1/14

o HGV manoeuvring - LAeq 72dB and LAmax,F 80dB at 5m o HGV loading/unloading using an diesel forklift: LAeq 73dB and LAmax,F 84dB at

5m



5.2 Extract fan operation

The ridge extract fans will be thermostatically controlled, with the total number of fans operating at any one time dependent on the bird’s ventilation requirements; this is dictated by the external temperature.

To maintain the ideal or ‘set’ temperature the fans are operated in Stages. Stage 1 will be triggered when the internal temperature rises 1°C above the set temperature; further Stages are activated with further 0.5°C increments.

The highest Stage (100% ridge extract fans operating) will typically only be triggered when the external temperature is above 23°. This temperature is not expected to be exceeded between 20:00 – 07:00hrs.

During the evening and night the external temperature will fall; the highest expected percentage of ridge extract fans required to maintain the set temperature are 50% and 25% respectively.

The calculation has therefore been based on:

• Day (07:00 – 20:00hrs): 100% ridge fans operating • Evening (20:00 – 23:00hrs): 50% ridge fans operating • Night (23:00 – 07:00hrs): 25% ridge fans operating

5.3 Transport vehicle operation

Traffic for the proposed scheme will consist of:

• Bird Delivery - 5 lorries at the beginning of the 48week flock cycle. • 3 x egg collections per week. • 2 x feed delivery per week. • 1 x dead bird collections per week. • Bird Removal - 5 lorries at the end of the flock cycle. • Manure Removal - 36 tractors and trailers (540 tonne) with an agricultural loader at the

end of each flock cycle. The manure removal will be over a 2-day period. • Dirty Water Removal - 2 x tractor and tanker at the end of the flock cycle.

The majority of transport movements will only occur during the working day (07:00 – 20:00hrs). However, in order to avoid stressing the birds stocking/destocking is typically undertaken during the night. Loading/unloading of the HGVs will be undertaken using a forklift on the concrete apron to the north and south of the poultry units.

5.4 Derivation of aggregate extract fan and HGV loading/unloading Specific Level

The individual noise level of each noise source has been calculated at Dwellings A - C; Figure 1. The following corrections have been applied to the source noise data:

• Directivity corrections (extract fans only): correction to convert the fan noise data from the manufacturers stated level at 45° lateral to 90° lateral (the propagation angle for the assessed dwellings), determined using the corrections given in Duct Directivity Index Applications (Day H. Hansen C & Bennett B, Acoustics Australia 96 Vol. 37 December (2009) No. 3). For the calculation a typical axial frequency spectra has been used

• Reflections (extract fans only): 3dB added to account for reflections off the poultry shed roof/façade

• Distance correction: 20 x log (d1/d0), where d1 = distance between receptor and the proposed extract fan and d0 = reference distance



• Shielding attenuation: Where the line of sight between the noise source and dwelling is fully blocked by a solid barrier, i.e. by local topography or the sheds themselves, 10dB shielding correction has been applied in accordance with BS5228-1 2009.

• Ground absorption correction: ISO 9613-2: Attenuation of sound during propagation outdoors, Formula 10:

Agr = 4.8 – (2hm/d)[17 + (300/d)] Where,

hm = mean height of the propagation path above ground d = distance from source to receptor

In accordance with ISO 9613-2 the ground absorption correction is assumed to be zero when the line of sight of the noise source is partially or fully blocked by a solid body (i.e. when a shielding correction is applicable)

• Atmospheric attenuation: ISO 9613-2: Attenuation of sound during propagation outdoors, Formula 8:

Aatm = αd/100

Where, α = is the atmosphere attenuation coefficient for a temperature of 10°C and

70% relative humidity d = distance from source to receptor

In accordance with ISO 9613-2 the attenuation at 500Hz has been used as only the dB(A) value of the inlet/extract fans are known

• On-time correction: The following on-times have been used: o Extract fans: it has been assumed that the fans are operating continuously and

consequently no ‘on-time’ correction has been applied o Transport movements:

§ Day (over any 1 hour period): 45-minutes for loading/unloading and 2 minutes for manoeuvring

§ Night (over any 15-minute period): 13-minutes for loading/unloading and 2 minutes for manoeuvring

Table A1 – A4, Appendix A provide the full calculations of the aggregate Specific Level at Dwellings A - C.

5.5 Rating Level

To establish the Rating Levels the following BS4142 character corrections have been applied to the calculated Specific Level.

• Extract fans: 0dB – inhouse measurements of in situ Fancom 3680 units confirm that they are not tonal or contain impulsive elements. Their operation will not be readily distinctive against the residual noise to be characterised as intermittent.

• Egg/stock collection/delivery: o HGV manoeuvring – 3dB to account for intermittency of operation. o Loading/unloading using a forklift – 6dB to account for potential ‘highly

perceptible’ impulsive noise. Note that we have observed that with careful operation of the forklift (i.e. slowing loading crates) impulsive noise can be minimised. The operation noise will also be intermittent. However, as is standard practice, the total character corrections have been capped at 6dB



5.6 Assessment Level

We define Assessment Level = RL – min LA90 dB, where:

RL = Rating Level, dB(A) LA90 dB = the typical background noise level, LA90 (in the case of this assessment the values are assumed levels taking into account the rural location).

Table 1 provides the resultant Assessment Levels at Dwellings A – C.

Where the Rating Level is at parity with the typical background noise level (Assessment Level = 0 dB) BS4142 states that the Specific Level will have a low impact; an adverse impact is indicated where the Rating Level ≥ 5dB and -10dB) and negligible during the evening (Assessment Level ≤ -10dB).

During the night (23:00 – 07:00hrs) the assumed typical background noise level and established Rating Levels are very low. We therefore consider, in accordance with BS4142, that the absolute noise levels at Dwellings A - C during the night are of more relevance in determining the noise impact than the Assessment Levels in this case.

We consider it is reasonable to assume that the occupiers of Dwellings A - C will be within their houses during the night period. On the basis that a facade with an open window will provide 15dB sound reduction (source: WHO “Night Noise Guidelines for Europe’), the highest resultant noise ingress will be:

[A] R

atin

g Le

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dB

[B] T

ypic

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L A90

dB

[A] -

[B]

Ass

essm

ent

Leve

l, dB

[C] R

atin

g Le

vel,

dB

[D] T

ypic

al

L A90

dB

[C] -

[D]

Ass

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Leve

l, dB

[E] R

atin

g Le

vel,

dB

[F] T

ypic

al

L A90

dB

[E] -

[F]

Ass

essm

ent

Leve

l, dB

A 21 35 -14 18 30 -12 16 25 -9B 23 35 -12 19 30 -11 17 25 -8C 21 35 -14 18 16 25 -9A 28 35 -7 29 25 4B 28 35 -7 29 25 4C 27 35 -8 29 25 4A 29 35 -7 18 30 -12 29 25 4B 29 35 -6 19 30 -11 30 25 5C 28 35 -7 18 30 -12 29 25 4

Note: Typical background noise levels are assumed values based on similar rural location sites

[1] Extract fans

[2] Loading HGVs

Aggregate [1] + [2]

N/A

Table 1. Typical background and calculated Rating and Assessment Levels at Dwellings A - C; Figure 1

Noi

se s

ourc

e

Dw

ellin

g

100% ridge extract fans operating



Day: 07:00 -

20:00hrs

Evening : 20:00 -

23:00hrs

Night : 23:00 -

07:00hrs

N/A

N/A



• Extract fans: LAeq -1dB • Transport activities within the concrete apron: LAeq,15min 8dB and LAmax 19dB

The above ambient noise ingress levels are extremely low, which when taking into consideration masking that will be provided by the existing noise environment, are considered to result in a negligible noise impact.

With regard to sleep quality the World Health Organization’s (WHO) ‘Night Noise Guidelines for Europe’ provides a threshold level LAmax,F 42dB; individual noise events that exceed this level have the potential to result in ‘waking up in the night and/or too early in the morning’ .

The number of noise events that exceed the threshold level will also have a bearing on the potential for sleep disturbance. Though this is discussed in WHOs’ document it is not quantified. In PRoPG: Planning and Noise however it stated that where the number of individual noise events that exceed LAmax,F 45dB does not exceed 10 during the night period it can be regarded as a negligible risk.

In the case of night period HGV loading/unloading the individual events noise ingress will be below WHOs’ sleep disturbance threshold and therefore we conclude there will not be an adverse noise impact.

It should also be highlighted that collection/delivery of birds during the night will occur infrequently; it is therefore the noise emissions from the extract fans that will be the main noise source.

5.7 Site management

Though a very low to negligible noise impact has been determined for the assessed noise sources, site management will still be important to minimise noise emissions. This should include:

• Driver’s of HGVs or forklifts instructed to avoid leaving engines running or excessive revving of engines.

• Forklift drivers instructed to move stock carefully, avoiding unnecessary scraping and to slowly maneuver crates in order to minimise impact noise

• Maintenance and repair of the concrete apron/access road to ensure that they are as smooth as practicable to minimise impact noise

5.8 Calculation uncertainty

With all calculations there is a level of uncertainty, which in this case we do not expect to be greater than +/-3dB (3dB is a just perceptible change in noise level). This small level of uncertainty is not considered to have any significance to the outcome of the assessment.

The assumed typical background noise levels used in the assessment, which take into account of the rural setting of the development, are low. If however the underlying noise environment is lower than assumed it is very unlikely to be significantly so.

We have measured transport activity noise levels at various poultry and other commercial developments. These have returned results comparable to the source data used in this assessment. We therefore conclude that the source noise data is suitably robust and representative for the purpose of the assessment.

The difference between halving or doubling the number of fans operating (e.g. 50% to 100%) is 3dB. With smaller changes in the number of fans operating, for example, 50% to 70%, the change in aggregate noise emissions will be less than 2dB; this represents an imperceptible change in noise.

We therefore consider the used percentage of fans as suitably robust for the purpose of the assessment; it reflects the percentage of fans used in poultry units as advised by both operators



and experts and would not result in a perceptible change in noise emissions with a 20 – 25% increase/decrease in the number of fans operating.

6. Conclusion

The aggregate of the extract fans and transport activities (HGV movements and unloading) noise emissions and resultant Rating Levels at the nearest dwellings to the proposed poultry units at Falsidehill Farm, Kelso (Figures 1 and 2) have been determined by calculation; Tables A1 – A4, Appendix A

Where the Rating Level is at parity with the typical background noise level BS4142 states that the Specific Level will have a low impact; an adverse impact is indicated where the Rating Level ≥ 5dB and

Matrix Acoustic Design Consultants Appendix A Calculations


dB(A)

[A] Sound Pressure Level, Lp, at 7m, 45 ° lateral: 50

[B] Directivity correction (45° to 90°): 4

[C] Reflection off poultry shed roof: 3

[A] - [B] + [C] L p at 7m, 45° lateral: 49

1 2 3 4 1 2 3 4 1 2 3 4

1 768.5 790.5 812.9 836.2 40.8 41.1 41.3 41.5 0.0 0.0 0.0 0.0

2 767.7 789.7 812.2 835.4 40.8 41.0 41.3 41.5 0.0 0.0 0.0 0.0

3 766.9 789.0 811.4 834.7 40.8 41.0 41.3 41.5 0.0 0.0 0.0 0.0

4 766.2 788.2 810.7 834.0 40.8 41.0 41.3 41.5 0.0 0.0 0.0 0.0

5 765.5 787.6 810.0 833.4 40.8 41.0 41.3 41.5 0.0 0.0 0.0 0.0

6 764.9 787.0 809.4 832.8 40.8 41.0 41.3 41.5 0.0 0.0 0.0 0.0

7 764.3 786.4 808.9 832.3 40.8 41.0 41.3 41.5 0.0 0.0 0.0 0.0

8 763.8 785.9 808.3 831.8 40.8 41.0 41.2 41.5 0.0 0.0 0.0 0.0

9 763.3 785.4 807.9 831.3 40.8 41.0 41.2 41.5 0.0 0.0 0.0 0.0

10 762.9 785.0 807.4 830.9 40.7 41.0 41.2 41.5 0.0 0.0 0.0 0.0

11 762.5 784.6 807.1 830.5 40.7 41.0 41.2 41.5 0.0 0.0 0.0 0.0

12 762.2 784.2 806.7 830.2 40.7 41.0 41.2 41.5 0.0 0.0 0.0 0.0

13 761.9 783.9 806.4 830.0 40.7 41.0 41.2 41.5 0.0 0.0 0.0 0.0

14 761.7 783.7 806.2 829.7 40.7 41.0 41.2 41.5 0.0 0.0 0.0 0.0

1 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

2 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

3 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

4 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

5 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

6 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

7 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

8 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

9 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.6 2.2 1.9 1.6 1.3

10 4.6 4.6 4.6 4.6 1.4 1.5 1.5 1.6 2.2 1.9 1.7 1.4

11 4.6 4.6 4.6 4.6 1.4 1.5 1.5 1.6 2.3 2.0 1.7 1.4

12 4.6 4.6 4.6 4.6 1.4 1.5 1.5 1.6 2.3 2.0 1.7 1.4

13 4.6 4.6 4.6 4.6 1.4 1.5 1.5 1.6 2.3 2.0 1.7 1.4

14 4.6 4.6 4.6 4.6 1.4 1.5 1.5 1.6 2.3 2.0 1.7 1.4

Specific Level, dB

Rating Level, dB

Specific Level, dB

Rating Level, dB

Specific Level, dB

Rating Level, dB

Night (23:00 - 07:00hrs): 25% ridge extract fans operating Note 2

14

17

Note 1: Assumed only odd numbered fans operating

Note 2: Assumed only 1, 5, 10 & 14 numbered fans operating

BS4142 character correction 3Day (07:00 - 20:00hrs):

100% ridge fans operating19

22

Evening (20:00 - 23:00hrs): 50% ridge extract fans operating Note 1

16

19

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Table A1. Calculation of extract fan noise from proposed poultry units at Dwelling A

Extract fans: Big Dutchman FF091-6DT

Fa Shed Shed Shed



dB(A)[A] Sound Pressure Level, Lp, at 7m, 45 ° lateral: 50

[B] Directivity correction (45° to 90°): 4[C] Reflection off poultry shed roof: 3[A] - [B] + [C] L p at 7m, 45° lateral: 49

1 2 3 4 1 2 3 4 1 2 3 41 821.8 800.2 778.1 754.6 41.4 41.2 40.9 40.7 0.0 0.0 0.0 0.02 821.0 799.4 777.3 753.8 41.4 41.2 40.9 40.6 0.0 0.0 0.0 0.03 820.3 798.6 776.5 753.0 41.4 41.1 40.9 40.6 0.0 0.0 0.0 0.04 819.6 797.9 775.8 752.2 41.4 41.1 40.9 40.6 0.0 0.0 0.0 0.05 819.0 797.2 775.1 751.5 41.4 41.1 40.9 40.6 0.0 0.0 0.0 0.06 818.4 796.6 774.4 750.8 41.4 41.1 40.9 40.6 0.0 0.0 0.0 0.07 817.8 796.0 773.8 750.2 41.4 41.1 40.9 40.6 0.0 0.0 0.0 0.08 817.3 795.5 773.2 749.6 41.3 41.1 40.9 40.6 0.0 0.0 0.0 0.09 816.9 795.0 772.7 749.1 41.3 41.1 40.9 40.6 0.0 0.0 0.0 0.0

10 816.4 794.6 772.3 748.7 41.3 41.1 40.9 40.6 0.0 0.0 0.0 0.011 816.1 794.2 771.9 748.2 41.3 41.1 40.8 40.6 0.0 0.0 0.0 0.012 815.7 793.8 771.5 747.9 41.3 41.1 40.8 40.6 0.0 0.0 0.0 0.013 815.5 793.5 771.2 747.6 41.3 41.1 40.8 40.6 0.0 0.0 0.0 0.014 815.2 793.3 770.9 747.3 41.3 41.1 40.8 40.6 0.0 0.0 0.0 0.01 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.7 2.0 2.42 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.43 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.44 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.45 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.46 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.47 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.48 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.49 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.4

10 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.411 4.6 4.6 4.6 4.6 1.6 1.5 1.5 1.4 1.5 1.8 2.1 2.412 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.4 1.5 1.8 2.1 2.513 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.4 1.6 1.8 2.1 2.514 4.6 4.6 4.6 4.6 1.5 1.5 1.5 1.4 1.6 1.8 2.1 2.5

Specific Level, dBRating Level, dB




1417

Note 1: Assumed only odd numbered fans operatingNote 2: Assumed only 1, 5, 10 & 14 numbered fans operating

BS4142 character correction 3Day (07:00 - 20:00hrs):

100% ridge fans operating2023

Evening (20:00 - 23:00hrs): 50% ridge extract fans operating Note 1

1619

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B

Table A2. Calculation of extract fan noise from proposed poultry units at Dwelling B


Fa

Shed Shed Shed



dB(A)[A] Sound Pressure Level, Lp, at 7m, 45 ° lateral: 50

[B] Directivity correction (45° to 90°): 4[C] Reflection off poultry shed roof: 3[A] - [B] + [C] L p at 7m, 45° lateral: 49

1 2 3 4 1 2 3 4 1 2 3 41 850.0 839.5 829.6 822.1 41.7 41.6 41.5 41.4 0.0 0.0 0.0 0.02 855.5 845.1 835.3 827.8 41.7 41.6 41.5 41.5 0.0 0.0 0.0 0.03 861.0 850.7 840.9 833.5 41.8 41.7 41.6 41.5 0.0 0.0 0.0 0.04 866.6 856.4 846.6 839.3 41.9 41.8 41.7 41.6 0.0 0.0 0.0 0.05 872.2 862.0 852.3 845.0 41.9 41.8 41.7 41.6 0.0 0.0 0.0 0.06 877.7 867.6 858.0 850.7 42.0 41.9 41.8 41.7 0.0 0.0 0.0 0.07 883.3 873.2 863.7 856.5 42.0 41.9 41.8 41.8 0.0 0.0 0.0 0.08 888.9 878.9 869.3 862.2 42.1 42.0 41.9 41.8 0.0 0.0 0.0 0.09 894.5 884.5 875.0 868.0 42.1 42.0 41.9 41.9 0.0 0.0 0.0 0.0

10 900.1 890.2 880.7 873.7 42.2 42.1 42.0 41.9 0.0 0.0 0.0 0.011 905.7 895.8 886.4 879.5 42.2 42.1 42.1 42.0 0.0 0.0 0.0 0.012 911.3 901.5 892.2 885.3 42.3 42.2 42.1 42.0 0.0 0.0 0.0 0.013 916.9 907.1 897.9 891.0 42.3 42.3 42.2 42.1 0.0 0.0 0.0 0.014 922.5 912.8 903.6 896.8 42.4 42.3 42.2 42.2 0.0 0.0 0.0 0.01 4.6 4.6 4.6 4.6 1.6 1.6 1.6 1.6 1.1 1.2 1.4 1.52 4.6 4.6 4.6 4.6 1.6 1.6 1.6 1.6 1.0 1.2 1.3 1.43 4.6 4.6 4.6 4.6 1.6 1.6 1.6 1.6 1.0 1.1 1.2 1.34 4.6 4.6 4.6 4.6 1.6 1.6 1.6 1.6 0.9 1.0 1.2 1.25 4.6 4.6 4.6 4.6 1.7 1.6 1.6 1.6 0.8 1.0 1.1 1.26 4.6 4.6 4.6 4.6 1.7 1.6 1.6 1.6 0.8 0.9 1.0 1.17 4.6 4.6 4.6 4.6 1.7 1.7 1.6 1.6 0.7 0.8 0.9 1.08 4.6 4.6 4.6 4.6 1.7 1.7 1.7 1.6 0.6 0.8 0.9 1.09 4.6 4.6 4.6 4.6 1.7 1.7 1.7 1.6 0.6 0.7 0.8 0.9

10 4.6 4.6 4.6 4.6 1.7 1.7 1.7 1.7 0.5 0.6 0.7 0.811 4.6 4.6 4.6 4.6 1.7 1.7 1.7 1.7 0.4 0.6 0.7 0.812 4.6 4.6 4.6 4.6 1.7 1.7 1.7 1.7 0.4 0.5 0.6 0.713 4.6 4.6 4.6 4.6 1.7 1.7 1.7 1.7 0.3 0.4 0.5 0.614 4.6 4.6 4.6 4.6 1.8 1.7 1.7 1.7 0.2 0.4 0.5 0.5




BS4142 character correctionDay (07:00 - 20:00hrs):

100% ridge fans operatingEvening (20:00 - 23:00hrs):

50% ridge extract fans operating Note 1



182115181316

Shed Shed Shed

3

Dis

tanc

e co

rrect

ion,

dB

Gro

und

abso

rptio

n, d

B

Atm

osph

eric

atte

nuat

ion,

dB

Soun

d pr

essu

re le

vel a

t dw

ellin

g, d

BSh

eild

ing

atte

nuat

ion,

dB

Note 2: Assumed only 1, 5, 10 & 14 numbered fans operatingNote 1: Assumed only odd numbered fans operating

Dire

ct d

ista

nce,

mTable A3. Calculation of extract fan noise from proposed poultry units at Dwelling C

Fa



LAeq dB

HGV manoeuvring at 5m 72HGV loading/unloading using a diesel forklift at 5m 73

HG

V

m

anoe

uvrin

g

HG

V lo

adin

g/

unlo

adin

g us

ing

a di

esel

fork

lift

HG

V

m

anoe

uvrin

g

HG

V lo

adin

g/

unlo

adin

g us

ing

a di

esel

fork

lift

HG

V

m

anoe

uvrin

g

HG

V lo

adin

g/

unlo

adin

g us

ing

a di

esel

fork

lift

798 798 778 778 828 82844.1 44.1 43.8 43.8 44.4 44.4

0 0 0 0 0 04.7 4.7 4.7 4.7 4.7 4.71.5 1.5 1.5 1.5 1.6 1.6

2 45 2 45 2 45-14.8 -1.2 -14.8 -1.2 -14.8 -1.27.0 21.5 7.2 21.7 6.6 21.12 15 2 15 2 15

-8.8 0.0 -8.8 0.0 -8.8 0.013.0 22.7 13.2 23.0 12.6 22.4

3 6 3 6 3 6 Noise event Rating Level 10 27 10 28 10 27

Aggregate Rating Level Noise event Rating Level 16 29 16 29 16 28

Aggregate Rating Level

Table A4. Calculation of HGVs loading/unloading BS4142 Assessment Level at Dwellings A - C

BS4142 character corrections

818

BS4142 Rating & Assessment Level

BS4142 Specific Level

Noise ingress via open window (15dB sound reduction)

C

27

29

LAeq,15minutes dBLAmax,F dB

8 819 19

Night Rating Level, dB 29 29

Nig

ht

Perio

d Sp

ecifi

c Le

vel On time, mins

On time correction, dBSpecific Level, dB

Specific Level, dB

Day

Pe

riod

Spec

ific

Leve

l On time, minsOn time correction, dB

Working Day Rating Level, dB 28 28

84

Corrections

Distance, mDistance correction, dBShielding correction, dBGround absorption, dB

Noise Event

Atmospheric attenuation, dB

Source noise levels

Dwelling A B

LAmax,F dB

80

Matrix Acoustic Design Consultants Appendix B Fan noise data


Edition: 04/2015 -GB

Data sheet: Fan for exhaust air chimney

Code no Description60-47-7907 Fan FF091-6DT 3x400V 50/60Hz 1.9/2.4A f/tube

valid for the following chimney types:60-39-0130 Exhaust air chimney CL920-30-VC-2900 gray

60-39-0140 Exhaust air chimney CL920-30-VC-2900 brown

60-39-0150 Exhaust air chimney CL920-30-AF-2900 gray

60-39-0160 Exhaust air chimney CL920-30-AF-2900 brown

Parameter Unit Value CommentNominal voltage [V] / [Hz] 400/50 460/60Allowable voltage [V] 360-440Current consumption [A] 1.9 2.4 at 60 HzMax. ambient temperature [°C] 40°CSound power level (LwA) [dB(A)] -Sound pressure level (LpA) [dB(A)] 50 Distance 7m / 30 PaWeight [kg] 19.5Speed control [-] FU, TriacProtection class [-] IP 54Certificate [-] CE, ErP2015

Pressure Air volume Air speed Specific capacity

Illustration

[Pa] [m3/h] [m/s] [W/1000m3]0 - - -

10 25,100 10.5 29.3

20 24,100 10.1 -

30 23,200 9.7 -

40 22,200 - -

50 21,000 - -

60 19,600 - -

80 16,000 - -

100 - - -

120 - - -

140 - - -

160 - - -

Big Dutchman International GmbHBig Dutchman Pig Equipment GmbH

P.O Box 1163 · D-49360 Vechta · GermanyTel. +49(0)4447 / 801-0 · Fax. +49(0)4447 /801-237

E-mail: [email protected]

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