file 8 noise acoustic report

8/13/2019 File 8 Noise Acoustic Report

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www.wyg.com creative mindssafe hands

William Davis Ltd

Proposed Housing Scheme,

Shelford Road,

Radcliffe-on-Trent

Noise and Vibration Assessment

December 2012

Executive Park, Avalon Way, Anstey, Leicester, LE7 7GR

Tel: +44 (0)116 234 8000

Email: [email protected]


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Document Control

Project: Proposed Residential Development, Shelford Road, Radcliffe-on-Trent

Client: William Davis Ltd

Job Number: A079137

File Origin: O:\Acoustics Air Quality and Noise\Active Projects\A079137

Document Checking:

Prepared by:Graham DavisConsultant

Signed:

Contributor:Nathan Joe AllenGraduate Environmental Scientist

Signed:

Verified by:Nigel Mann

Associate Environmental ScientistSigned:

Issue Date Status

1 03rdDecember 2012 First Issue

2

3

4


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Contents Page

1.0 Introduction.................................................................................................................................12.0 Assessment Criteria......................................................................................................................23.0 Assessment Methodology .............................................................................................................54.0 Site Survey ..................................................................................................................................95.0 Assessment of Key Effects..........................................................................................................126.0 Conclusions ...............................................................................................................................17

Appendix Contents

Appendix A Acoustic Terminology and AbbreviationsAppendix B Sketches


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Noise Assessment Report

William Davis Ltd 1 A079137

Proposed Residential Development December 2012

1.0 Introduction

1.1 Purpose of this Report

This report presents the findings of a noise and vibration assessment for a proposed residential

development, on Shelford Road, Radcliffe-on-Trent.

A description of the existing noise environment in and around the site is provided. Noise surveys have been

undertaken and the results used to verify predictions of the short-term and long-term effects of noise. The

noise levels from the proposed development have been predicted at local representative receptors using

CADNA noise modelling software which incorporates ISO 9613 and CRTN methodologies and calculations.

A list of acoustic terminology and abbreviations used in this report is provided in Appendix A and a set of

location plans and noise contour plots relevant to the assessment are presented in Appendix B.

1.2 Legislative Context (England)

PPG24 was replaced by NPPF on 27 March 2012. With regard to noise and planning NPPF contains the

following 4 short statements (section 123):

A. Avoid noise from giving rise to significant adverse impacts on health and quality of life as a result of

new development;

B. Mitigate and reduce to a minimum other adverse impacts on health and quality of life arising from

noise from new development, including through the use of conditions;

C. Recognise that development will often create some noise and existing businesses wanting to

develop in continuance of their business should not have unreasonable restrictions put on them

because of changes in nearby land uses since they were established; and

D. Identify and protect areas of tranquillity which have remained relatively undisturbed by noise and

are prized for their recreational and amenity value for this reason.

Vibration is not specifically considered in the National Planning Policy Framework. However, it is considered

that the relevant standards remain for guidance on human exposure to vibration in BS 6472:2008 and for

buildings in BS 7385-2:1993.


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2.0Assessment Criteria

2.1Internal Noise Assessment Criteria

The criteria in BS 8233:1999 Sound insulation and noise reduction for buildings code of practice has

been chosen as a suitable method for determining an adequate level of noise control to ensure that noise

levels within existing properties, as a result of the proposed development, meet the following noise

guideline values specified in the standard:

Good Reasonable

Living rooms LAeq= 30 - 40 dB

Bedrooms LAeq= 30 - 35 dB, LAmax, night-time = 45 dB

Gardens LAeq= 50 - 55 dB

BS 8233:1999 suggests that a typical faade, regardless of construction, will offer a maximum of 15 dB

sound insulation when windows are open. For the purposes of this assessment, the maximum external

noise level from the source under consideration will be 45 dB(A) during the daytime, and 45 dB(A) during

the night-time to ensure a maximum daytime LAeqof 30 dB, and a maximum night-time LAeqof 30 dB within

habitable rooms are achieved.

These levels are also comparable to the World Health Organisation Recommendations in their Guidelines

for Community Noise (1999) publication which states that outdoor levels of 45 dB LAeq,Tfor open windows

at night or internal levels of 30 dB LAeq,Tare guideline values to prevent sleep disturbance. Similarly

outdoor levels of 60 dB LAmaxfor open windows at night or internal levels of 45 dB LAmaxare also maximum

guideline values to prevent sleep disturbance.

2.2 Vibration Assessment Criteria

There are two applicable British Standards to describe vibration which are: BS 6472-2:2008, Guide to

Evaluation of Human Exposure to Vibrations in Buildings (1 Hz to 80 Hz) and BS 7385-2:1993 Evaluation

and Measurement for Vibration in Buildings Parts 1 (1990) and 2 (1993).

2.2.1 Building Damage

BS 7385-2:1993 Evaluation and Measurement for Vibration in Buildings provides guidance on acceptable

values of transient vibration for avoidance of cosmetic damage to buildings as follows.


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Table 2.1 Transient Vibration Guide Values for Cosmetic Damage

Table 2.1 above shows the limits for transient vibration, above which cosmetic damage could occur. Minor

damage is possible at vibration magnitudes which are greater than twice those given above and major

damage to a building structure may occur at values greater than four times the tabulated values. PPV

values of below 15 mm/s are unlikely to results in any damage to buildings.

Damage is classified into the following categories:

Table 2.2 Damage Classification

2.2.2 Human Exposure

BS 6472-2:2008 Guide to evaluation of human exposure to vibrations in buildings provides general

guidance on human exposure to building vibration in the range of 1 Hz to 80 Hz and includes curves of

equal annoyance for humans. It also outlines the measurement methodology to be employed.

It introduces the concept of Vibration Dose Value (VDV) and estimated Vibration Dose Value (eVDV) for thebasis of assessment of the severity of impulsive and intermittent vibration levels, such as would be caused

by a series of trains passing a given location.

Human reaction to vibration depends on displacement, frequency, the duration (exposure time), point of

application and direction of the vibration. It appears that the effect of vibration on the people within a

building will be far more serious than the effect on the building itself. The units in which VDV and eVDV

are measured are metres per second raised to the power of minus 1.75 (or ms -1.75).

The Standard gives recommended vibration dose values above which various degrees of adverse comment

may be expected in residential buildings, with a daily 16 hour VDV of 0.2 to 0.4 ms-1.75 likely to give low

probability of adverse comment as shown in the following table.

Peak Component Particle Velocity in

frequency range of predominant pulseType of Building

4 Hz to 15 Hz 15 Hz and above

Residential of Light Commercial TypeBuildings

15 mm/s at 4 Hz increasing to20 mm/s at 15 Hz

20 mm/s at 15 Hz increasing to50 mm/s at 50 Hz and above

Damage Description

CosmeticThe formation of hairline cracks2 on drywall surfaces, or the growth of existing

cracks in plaster or drywall surfaces; in addition, the formation of hairline cracks inmortar joints of brick/concrete block construction.

MinorThe formation of large cracks or loosening and falling of plaster or drywall surfaces,

or cracks through bricks/concrete blocks.

MajorDamage to structural elements of the building, cracks in support columns, loosening

of joints, splaying of masonry cracks, etc


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3.0 Assessment Methodology

3.1 Noise Modelling Methodology

Three dimensional noise modelling has been undertaken based on the monitoring data to predict LAeqand

LAmaxnoise levels at a large number of locations both horizontally and vertically. CADNA noise modelling

software has been used (as shown in Figure 3.1). This model is based on the Department of Transport

Calculation of Road Traffic Noise (CRTN) and ISO 9613 noise propagation methodology and allows for

detailed prediction of noise levels to be undertaken for large numbers of receptor points and different noise

emission scenarios both horizontally and vertically.

Figure 3.1 CADNA Noise Model


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The modelling software calculates noise levels based on the emission parameters and spatial settings that

are entered. Input data, assumptions and model settings as given in the table below have been used.

Table 3.1 Modelling Parameters Sources and Assumptions

Parameter Source Details

Horizontal distances around site Ordnance Survey Ordnance Survey

Ground levels around site Ordnance Survey Ordnance Survey

Ground levels other areasSite Observations and OrdnanceSurvey

OS 1:25,000 contours and OS 1:10,000 spotheights.

Traffic data, main surrounding roads WYGETraffic flows for local roads based on WYGEobservations and experience.

Traffic data local roads WYGETraffic flows for local roads based on WYGEobservations and experience.

Building heights around site WYGE Observations8 m height for two storey residential properties,and 4 m for Bungalows

Barrier heights WYGE ObservationsAll existing barriers at 1.0 m with the exceptionof hedges and trees which are assumed to offerno noise protection.

Receptor positions WYGE

1 m from faade, height of 1.5 m for groundfloor, 4 m for first floor properties with groundfloor or bungalow dormer windows. 7 m fordormer windows on two storey properties. 1.5m height for model grid and monitoring

locations for validation.

Reflections WYGEFirst order reflections have been applied basedon mirror image sources

Absorbent Ground CADNAFrequency dependant ground absorption hasbeen applied based on values specified in VDI2714/16 clause 6.3.

Faade Correction CADNAFaade corrections have been incorporated intothe modelling

Gradient CADNAGradient for each road has been calculatedfrom the height information using the calcslope of roads tool

It is acknowledged that a number of these assumptions will affect the overall noise levels presented in this

report. However it should be noted that certain assumptions made, as identified above, are worst case.


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3.2 Model Input Data

3.2.1 Traffic Noise Data

All roads expected to make a significant contribution, have been included within this assessment. Noise

emissions from existing traffic flows have been derived from verification of the measured noise levels, along

with observations made during the site survey and/or WYG Environment (WYGE) experience of similar road

systems. Estimates of the vehicle speeds have been made based upon the speed restrictions currently in

force in the area.

3.2.2 Model Verification

The model was verified by modelling the monitoring locations for the existing scenario. A daytime and

night time LAeq and night time LAmaxscenario has been verified. The comparison between the monitoring and

modelling results are shown in the tables below.

Table 3.2 Modelled vs. Monitored Results LAeq; daytime 07:00 23:00

Location Monitored LAeq Modelled LAeqDifference between

Monitored and ModelledResults

LT1 64.6 64.6 0.0

LT2 60.9 60.9 0.0

LT3 48.7 47.2 -1.5

All values are sound pressure levels in dB re: 2x 10-5 Pa

Table 3.3 Modelled vs. Monitored Results LAeq; night-time 23:00 07:00

Location Monitored LAeq Modelled LAeqDifference between


LT1 54.6 54.6 0.0

LT2 53.1 53.1 0.0

LT3 42.0 39.6 -2.4


Table 3.4 Modelled vs. Monitored Results LAmax; night-time 23:00 07:00

Location Monitored LAmax Modelled LAmaxDifference between


LT1 86.0 85.5 -0.5

LT2 91.2 91.3 0.1

LT3 75.1 74.4 -0.7


The verification points show a divergence between monitored and modelled results of no more than 3 dB.

(15 minute night-time measurement), all models are assumed to be suitably verified.


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3.2.3 Sensitive Receptors

Existing noise levels have been assessed at properties to the north, centre and south of the site with

respect to direct noise from the existing ambient noise climate surrounding the site. An indicative site

layout showing the locations of the proposed receptors is shown of SK02 of Appendix B.

Table 3.5 Residential Receptor Locations

Ref. Description Closest SourceApproximateDistance ToSource (m)

Height (m)

R1 Property to the north of site (western faade) Shelford Road 20.13 4.0

R2 Property to the north of site (western faade) Shelford Road 17.19 4.0

R3 Property to the north west of site (western faade) Shelford Road 23.19 4.0

R4 Property to the north west of site (northern faade) Shelford Road 79.40 4.0

R5 Property to the north west of site (western faade) Shelford Road 151.23 4.0

R6 Property to the west of site (northern faade) Shelford Road 199.03 4.0

R7 Property to the west of site (western faade) Clumber Drive 44.33 4.0

R8 Property to the west of site (western faade) Clumber Drive 46.98 4.0

R9 Property to the south west of site (western faade) Clumber Drive 45.70 4.0

R10 Property to south west of site (southern faade) Clumber Drive 51.65 4.0

R11 Property to southern of site (southern faade) Railway 50.30 4.0

R12Property to the south east of the site (southernfaade)

Railway 28.69 4.0

R13 Property to the south east of site (eastern faade) Railway 67.78 4.0

R14 Property to the east of site (eastern faade) Railway 168.90 4.0

R15 Property to the east of site (eastern faade) Railway 256.88 4.0

R16 Property to the east of site (eastern faade) Shelford Road 354.90 4.0

R17 Property to the east of site (eastern faade) Shelford Road 276.47 4.0

R18 Property to the north east of site (eastern faade) Shelford Road 149.90 4.0

R19 Property to the north east of site (northern faade) Shelford Road 49.24 4.0

Table 3.6 Garden Receptor Locations

Co-ordinatesRef. Description

X Y Height (m)

G1 Plot to north of site 465529.5 340262.2 1.5

G2 Plot to north west of site 465415.0 340140.2 1.5

G3 Plot to north of site 465647.8 340094.8 1.5

G4 Plot to north centre of site 465649.7 340044.3 1.5

G5 Plot to centre of site 465621.9 339994.9 1.5

G6 Plot to west of site 465495.7 339906.2 1.5

G7 Plot to east of site 465789.7 339910.3 1.5

G8 Plot to south west of site 465629.4 339752.4 1.5

G9 Plot to south west of site 465565.2 339745.5 1.5


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4.0 Site Survey

4.1 Noise Survey

4.1.1 Noise Survey Methodology

A monitoring survey was undertaken to characterise baseline ambient noise levels currently experienced on

the site and to establish the relative local background and traffic noise levels.

Equipment used during the survey included:

B&K 2260 Environmental Noise Analyser (WYG1) s/n 2361273

B&K 4231 Calibrator s/n 2176211Rion NL-32 Environmental Noise Analyser (WYG12) s/n 213442

Rion NL-52 Environmental Noise Analyser (WYG13) s/n 620858

Rion NL-52 Environmental Noise Analyser (WYG14) s/n 610212

Norsonic 1251 Sound Calibrator s/n 31043

The measurement equipment was checked against the appropriate calibrator at the beginning and end of

the measurements, in accordance with recommended practice and no drift was observed. The accuracy of

the calibrators can be traced to National Physical Laboratory Standards, calibration certificates for which are

available on request.

A baseline monitoring survey was undertaken at 7 locations (as specified in the following table and shown

in SK01 of Appendix B) from Friday 19thOctober 2012 to Tuesday 23rdOctober 2012. Attended short term

measurements were undertaken at four locations during the day, evening, peak and night-time periods with

three additional locations being measured unattended over a 90 hour period. The raw data collected from

the long term monitoring is available upon request.

Measurements were taken in general accordance with BS 7445-1:2003 The Description and Measurement

of Environmental Noise: Guide to quantities and procedures. Weather conditions during the survey period

were observed as being dry with scattered showers. Anemometer readings confirmed that wind speeds

were less than 5 ms-1at all times during the survey.

Table 4.1 Noise Monitoring Locations

Grid ReferenceRef Description

X Y

LT1 North eastern corner of site 465550.91 340355.96

LT2 South eastern corner of the Site 465741.29 339713.83

LT3 North western site boundary, to south west of Shelford Road Farm. 465457.12 340004.34

ST1 Pavement of Shelford road, south of the Crown Cottages 465545.28 340368.95

ST2 Corner outside 125 Shelford Road 465334.70 340133.21

ST3 Corner of Haddon way / Clumber drive 465441.79 339812.49

ST4 Pavement outside 37 Hudson Way 465815.05 339639.62


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4.1.2 Noise Survey Results

Existing ambient noise levels around the site are dominated by traffic on Shelford Road to the north of the

site, and the Nottingham to Skegness railway line to the south of the site.

Ambient and background noise levels are usually described using the LAeqindex (a form of energy average)

and the LA90 index (i.e. the level exceeded for 90% of the measurement period) respectively. Road traffic

noise is generally described using the LA10 index (i.e. the level exceeded for 10% of the measurement

period).

The results of the statistical measurements and frequency measurements conducted during the survey are

summarised in the following table. All values are sound pressure levels in dB (re: 2 x 10-5Pa).

Table 4.2 Results of Baseline Noise Monitoring Survey (Average Levels)

PeriodDuration

(T)Monitoring Date and Times Location

LAeq,T(dB)

LAmax,T(dB)

LAmin,T(dB)

LA10,T(dB)

LA90,T(dB)

Day07:00 - 23:00

77 hours18/10/2012 - 23/10/2012

07:00 - 23:0064.6 96.5 25.1 66.3 43.6

Night23:00 07:00

40 hours18/10/2012 - 23/10/2012

23:00 - 07:00

LT1

54.6 87.8 22.0 45.0 34.4

Day

07:00 - 23:00

77 hours18/10/2012 - 23/10/2012

07:00 - 23:00

60.9 100.1 41.5 52.4 48.8

Night23:00 07:00

40 hours18/10/2012 - 23/10/2012

23:00 - 07:00

LT2

53.1 91.2 40.7 49.4 46.1

Day07:00 - 23:00

77 hours18/10/2012 - 23/10/2012

07:00 - 23:0048.7 89.4 27.4 47.7 42.1

Night23:00 07:00

40 hours18/10/2012 - 23/10/2012

23:00 - 07:00

LT3

41.4 75.1 23.2 41.9 35.2

15 Mins 22/10/2012 11:09 ST1 69.8 88.7 37.5 73.7 42.8

15 Mins 22/10/2012 11:30 ST2 47.5 60.6 36.0 50.9 40.4

15 Mins 22/10/2012 12:21 ST3 51.0 73.9 37.3 50.5 40.2

Day07:00 - 19:00

15 Mins 22/10/2012 13:11 ST4 50.9 71.2 42.4 51.1 45.7

15 Mins 22/10/2012 19:35 ST1 67.0 85.5 30.3 67.8 33.8

15 Mins 22/10/2012 21:34 ST2 60.1 82.1 29.5 59.0 33.1

15 Mins 22/10/2012 21:13 ST3 36.7 52.5 29.5 39.0 32.5

Evening19:00 - 23:00

15 Mins 22/10/2012 20:22 ST4 47.8 69.6 33.1 49.1 39.3

15 Mins 22/10/2012 23:00 ST1 62.1 87.7 24.2 45.3 25.7

15 Mins 22/10/2012 23:18 ST2 57.8 80.6 28.5 54.1 31.5

15 Mins 22/10/2012 23:35 ST3 41.6 68.6 28.6 38.5 31.5

Night23:00 - 07:00

15 Mins 22/10/2012 23:56 ST4 42.5 65.4 25.8 45.3 33.3



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4.2 Vibration Survey

Existing vibration levels around the site are dominated by rail traffic using the Nottingham to Skegnessrailway line to south of the site.

4.2.1 Vibration Survey Methodology

Measurements were obtained using a Vibrock Digital Seismograph Type V901 fitted with a ground vibration

transducer in continuity with a ground spike. The instrument measured Resultant, Displacement,

Acceleration and Peak Particle Velocity (PPV) at a scanning duration of 30 seconds. Attended measurements

were used to determine background levels and individual train passing events.

The vibration measurements were carried out at the following locations which are shown on SK01 of

Appendix B.

Table 4.3 Vibration Monitoring Locations

Grid ReferenceRef. Description

X Y

V1 Adjacent to railway line to the south west of the site 465691.79 339672.85

V2 Adjacent to railway line to the south east of the site 465817.24 339708.31

4.2.2 Vibration Survey Results

The following table shows the maximum Resultant, Displacement, Acceleration and Peak Particle Velocity

(PPV) measured at each monitoring location during normal conditions (background) and train passing

events.

Table 4.4 Vibration Measurement Results

LocationMax Resultant

(mm/s)Max Displacement

(mm)Max Acceleration (g)

MaxPPV (mm/s)

V1 - Background 0.200 0.001 0.17 0.175

V1 Train Passing 1 0.225 0.002 0.17 0.200

V1 Train Passing 2 0.550 0.002 0.36 0.225

V1 Train Passing 3 0.225 0.001 0.27 0.200

V1 Train Passing 4 0.225 0.001 0.20 0.200

V2 Background 0.200 0.001 0.17 0.175

V2 Train Passing 1 0.200 0.001 0.17 0.200

V2 Train Passing 2 0.250 0.002 0.30 0.250

V2 Train Passing 3 0.200 0.001 0.22 0.300

V2 Train Passing 4 0.225 0.001 0.27 0.250


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5.0Assessment of Key Effects

5.1 Noise Intrusion Assessment

Internal noise levels within potential dwellings have been assessed both with windows open, where a

reduction from a partially open window of 15 dB has been used, and with windows closed where an

assumption of glazing with specification Rw30 dB (e.g 6/12/6mm double glazing or equivalent) has been

used.

The results presented in tables 5.1 5.3 below show the predicted noise intrusion levels at properties to

the north, centre and south of the site. The recommended WHO/BS 8233 internal noise levels are

generally met across the site during the daytime and night-time, assuming a windows-closed scenario.In order to achieve the recommended internal noise criteria, a range of mitigation measures are outlined in

Section 5.3 of this report; SK06 in Appendix B shows the glazing and ventilation requirements for bedrooms

and living rooms of the proposed development.

Table 5.1 Daytime Noise Intrusion Levels LAeq 16 hour

LocationExternal LAeq

at 1m from facadeInternal LAeq with

windows openInternal LAeq withwindows closed

CriteriaInternal LAeq

R1 57.6 42.6 27.6 30 - 40

R2 57.4 42.4 27.4 30 - 40

R3 55.2 40.2 25.2 30 - 40

R4 48.8 33.8 18.8 30 - 40

R5 40.9 25.9 10.9 30 - 40

R6 39.2 24.2 9.2 30 - 40

R7 37.4 22.4 7.4 30 - 40

R8 37.8 22.8 7.8 30 - 40

R9 41.0 26.0 11.0 30 - 40

R10 47.9 32.9 17.9 30 - 40

R11 52.8 37.8 22.8 30 - 40

R12 55.6 40.6 25.6 30 - 40

R13 50.9 35.9 20.9 30 - 40

R14 47.9 32.9 17.9 30 - 40

R15 46.4 31.4 16.4 30 - 40

R16 46.1 31.1 16.1 30 - 40

R17 45.4 30.4 15.4 30 - 40

R18 48.8 33.8 18.8 30 - 40

R19 55.2 40.2 25.2 30 - 40

All values are sound pressure levels in dB re: 2x 10-5

Pa.


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Table 5.2 Night-time Noise Intrusion Levels LAeq 8 hour

LocationExternal LAeq

at 1m from facadeInternal LAeq with

windows openInternal LAeq withwindows closed

CriteriaInternal LAeq

R1 50.2 35.2 20.2 30

R2 50.6 35.6 20.6 30

R3 48.5 33.5 18.5 30

R4 42.1 27.1 12.1 30

R5 35.2 20.2 5.2 30

R6 33.0 18.0 3.0 30

R7 37.0 22.0 7.0 30

R8 35.4 20.4 5.4 30

R9 36.6 21.6 6.6 30

R10 44.5 29.5 14.5 30

R11 47.9 32.9 17.9 30

R12 50.7 35.7 20.7 30

R13 44.2 29.2 14.2 30

R14 40.9 25.9 10.9 30

R15 39.4 24.4 9.4 30

R16 39.1 24.1 9.1 30

R17 38.6 23.6 8.6 30

R18 41.5 26.5 11.5 30

R19 46.7 31.7 16.7 30

All values are sound pressure levels in dB re: 2x 10-5

Pa.


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Table 5.3 Night-time Noise Intrusion Levels LAmax

LocationExternal LAmax

at 1m from facadeInternal LAmax with

windows openInternal LAmax with

windows closedCriteria

Internal LAmax

R1 81.1 66.1 51.1 45

R2 81.6 66.6 51.6 45

R3 79.5 64.5 49.5 45

R4 72.9 57.9 42.9 45

R5 66.3 51.3 36.3 45

R6 63.6 48.6 33.6 45

R7 63.4 48.4 33.4 45

R8 64.0 49.0 34.0 45

R9 69.5 54.5 39.5 45

R10 77.9 62.9 47.9 45

R11 83.5 68.5 53.5 45

R12 86.7 71.7 56.7 45

R13 71.9 56.9 41.9 45

R14 66.7 51.7 36.7 45

R15 66.0 51.0 36.0 45

R16 67.2 52.2 37.2 45

R17 67.7 52.7 37.7 45

R18 71.5 56.5 41.5 45

R19 77.5 62.5 47.5 45

All values are sound pressure levels in dB re: 2x 10-5 Pa.


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5.1.1 Garden Noise Levels

Daytime noise levels in gardens and private external spaces of the proposed development have been

assessed in the table below. The location of the garden receptor locations are shown on SK03 inAppendix B.

Table 5.4 Garden Noise Levels LAeq,16hr

RefExternal LAeq,16hr

DaytimeBS 8233 Upper Limit

Criteria LAeq

G1 51.5 55.0

G2 48.8 55.0

G3 43.3 55.0

G4 39.5 55.0

G5 40.5 55.0

G6 42.5 55.0

G7 47.6 55.0

G8 51.0 55.0

G9 49.5 55.0

All values are sound pressure levels in dB re: 2x 10-5 Pa.

The results in the table above show that daytime LAeq noise levels within gardens are predicted to be

within the BS 8233 upper limit (55 dB).

5.2 Vibration Assessment

5.2.1 Potential Building Damage

The following table shows the maximum Peak Particle Velocity measured at the site for comparison with the

BS 7385 criteria.

Table 5.5 Vibration Assessment Building Damage

LocationAverage Resultant

(mm/s)Max

Resultant (mm/s)Damage Criteria Within Criteria

Foundations ofProposed Dwellings

0.263 0.550 15.0 Yes

The results in the table above show that the peak particle velocity (PPV) measured at a location

representative of the foundations of the proposed development is typically 2.0 mm/s and up to a maximum

of 3 mm/s. This is a positive indication that there is unlikely to be any building damage associated with

vibration from the adjacent highway.


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6.0 Noise Mitigation

6.1 Glazing and Ventilation Strategy

The ventilation strategy provided in SK06 has been designed to achieve internal daytime LAeqof 35 dB, an

internal night-time LAeq of 30 dB and an internal night-time LAmax of 45 dB in habitable rooms of the

proposed development. It also highlights which areas would (in the absence of any alternative mitigation

such as noise barriers) require enhanced glazing, or an alternative means of ventilation in order to meet

both ventilation and internal ambient noise criteria. Alternative ventilation can be provided in several ways

from acoustic trickle vents (which need to have a minimum sound reduction equal to or greater than the

glazing), other passive ventilation systems or mechanical ventilations systems.

It is recommended that any potential dwellings to the north of the site, within approximately 60 metres of

Shelford Road, and to the south of the site, within approximately 100 metres of the railway line be taken

into account in the site layout and design process. To reduce the impact of noise, enhanced glazing, the

favourable orientation of dwellings, suitably located windows and gardens and effective internal layouts

should be considered.


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7.0 Conclusions

Noise and Vibration surveys have been undertaken in connection with the proposed new housing

development on Shelford Road, Radcliffe-on-Trent.

Noise

NPPF 123 A & B

In considering the NPPF test in section 123, points A & B. The proposed development is not expected to

have an adverse impact on health or quality of life. Similarly, with regard to NPPF (123) point B, it is

considered that all adverse impacts on health and quality of life (relating to noise) are mitigated by the use

of appropriate mitigation.

NPPF 123 C & D

Given that nearby the site is surrounded by similarly residential properties to the north, west and the south,

it is not considered that any existing businesses wanting to develop would be particularly restricted by the

introduction of the new sensitive use of the proposed development.

The development is situated in a CPRE Zone 4 area of tranquillity (Zone 1 being the least tranquil and Zone

10 being the most tranquil), as such is not considered to be an area of Tranquillity.

Glazing and Ventilation Strategy

The recommended WHO/BS 8233 internal noise levels are generally met across the site during the daytime

and night-time, assuming a windows-closed scenario. A glazing and ventilation strategy has been provided

which achieves both ventilation and internal ambient noise level requirements of LAeq daytime35 dB, LAeq night-

time of 30 dB and LAmax night-time of 45 dB in all residential bedroom and living spaces of the proposed

development. The suggested glazing specifications are understood to be achievable. Standard double

glazing is sufficient across the majority of the site in order to achieve the target internal noise levels whenwindows. Dwellings within approximately 60 metres of Shelford Road to the north, and 100 metres of the

railway to the south would require enhanced glazing in order to meet internal target noise levels. All Garden

receptors are below BS 8233 Upper Limit Criteria levels for LAeq.

Vibration

An assessment of vibration levels has shown that maximum peak particle velocity (PPV) measured at a

location representative of the foundations of the proposed development is 0.550 mm/s. This is a positive

indication that there is unlikely to be any building damage associated with vibration from the existing use of

the adjacent railway. Calculated eVDV levels at this location are 0.18 ms-1.75 indicating that there is a low

risk of adverse comment.


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William Davis Ltd A079137


Appendices


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Appendix A Acoustic Terminology and Abbreviations

Acoustic Terminology

dB Sound levels from any source can be measured in frequency bands in order to provide detailed

information about the spectral content of the noise, i.e. whether it is high-pitched, low-pitched, or

with no distinct tonal character. These measurements are usually undertaken in octave or third

octave frequency bands. If these values are summed logarithmically, a single dB figure is

obtained. This is usually not very helpful as it simply describes the total amount of acoustic

energy measured and does not take any account of the ears ability to hear certain frequencies

more readily than others.

dB(A) Instead, the dBA figure is used, as this is found to relate better to the loudness of the sound

heard. The dBA figure is obtained by subtracting an appropriate correction, which represents the

variation in the ears ability to hear different frequencies, from the individual octave or third

octave band values, before summing them logarithmically. As a result the single dBA value

provides a good representation of how loud a sound is.

LAeq Since almost all sounds vary or fluctuate with time it is helpful, instead of having an instantaneous

value to describe the noise event, to have an average of the total acoustic energy experienced

over its duration. The LAeq, 07:00 23:00for example, describes the equivalent continuous noise level

over the 12 hour period between 7 am and 11 pm. During this time period the LpA at any

particular time is likely to have been either greater or lower that the LAeq, 07:00 23:00.

LAmin The LAmin is the quietest instantaneous noise level. This is usually the quietest 125 milliseconds

measured during any given period of time.

LAmax The LAmax is the loudest instantaneous noise level. This is usually the loudest 125 milliseconds

measured during any given period of time.

Ln Another method of describing, with a single value, a noise level which varies over a given time

period is, instead of considering the average amount of acoustic energy, to consider the length of

time for which a particular noise level is exceeded. If a level of x dBA is exceeded for say 6

minutes within one hour, then that level can be described as being exceeded for 10% of the totalmeasurement period. This is denoted as the LA10, 1 hr= x dB.

The LA10index is often used in the description of road traffic noise, whilst the LA90, the noise level

exceeded for 90% of the measurement period, is the usual descriptor for underlying background

noise. LA1and LAmaxare common descriptors of construction noise.

Rw The weighted sound reduction index determined using the above measurement procedure, but

weighted in accordance with the procedures set down in BS EN ISO 717-1. Partitioning and

building board manufacturers commonly use this index to describe the inherent sound insulation

performance of their products.


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Abbreviations

CADNA Computer Aided Noise Abatement

DMRB Design Manual for Roads and Bridges

HGV Heavy Goods Vehicle

PPG24 Planning Policy Guidance

UDP Unitary Development Plan

UKAS United Kingdom Accreditation Service

WYGE WYG Environment


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Appendix B Sketches

SK01 Noise Monitoring Locations

SK02 Indicative Site Layout and Receptor Locations

SK03 Daytime LAeq,16hr

SK04 Night-time LAeq,8hr

SK05 Glazing and Ventilation Strategy


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Client:

William Davis Ltd.

Project:

Shelford Road, Radcliffe

Project Number:

A079137

Drawing Title / Scenario:

Noise and VibrationMonitoring Locations

Drawing Number:

SK01

Site Boundary:

Scale : Not to scale

WYGE Leicester 03.12.12

This map is based upon Ordnance Surveymaterial reproducedbyWYG on behalf of Her Majesty's StationeryOffice, Crown Copyright. Unauthorised reproduction infringesCrown copyright and maylead to civil proceedings.

Licence Number AL 553611

Executive ParkAvalon WayAnsteyLeicestershireLE7 7GRTel 0116 234 8000

WYG Environment


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Proposed Layout& Receptor Locations

Drawing Number:

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Key:

Site Boundary:






WYG Environment


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Existing DaytimeLAeq,16hr Noise Levels

Drawing Number:

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Key:

0.0 - 55.0 dB55.0 - 63.0 dB63.0 - 72.0 dB72.0 - 90.0 dB

Site Boundary:






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William Davis Ltd

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Project Number:

A079137


Existing NightLAeq,16hr Noise Levels

Drawing Number:

SK04

Key:

0.0 - 45 dB45.0 - 57.0 dB57.0 - 66.0 dB66.0 - 90.0 dB

Site Boundary:






WYG Environment


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Project:


Project Number:

A079137


Glazing and VentilationStrategy

Drawing Number:

SK05

Key:

Site Boundary:

Alternative VentilationRequired:

Enhanced Glazing andAlternative VentilationRequired:




file 8 noise acoustic report

Documents