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Acoustic Report for No. 641-657 King Street, Newtown

Reference No.: 2015-286 Rev1

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ACOUSTIC NOISE & VIBRATION SOLUTIONS P/L Suite 603, Level 6 Compass Centre Bankstown, NSW 2200 ABN: 37 169 392 456

Phone: 9793 1393 Fax: 9708 3113 Email: [email protected]

Acoustic Report

- Traffic, Aircraft Noise & Rail Noise &

Vibration Assessment -

For proposed development at

No. 641-657 King Street, Newtown

Prepared By: Domeniki Tsagaris (M.I.E.Aust),B.E.(UNSW) Australian Acoustical Society (Sub).

Approved By: Moussa Zaioor (M.I.E. Aust), CPENG, Australian Acoustical Society (Member).

Date: October 26, 2015

Amended Date: October 31, 2016

Reference No.: 2015-286 Rev 1



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DOCUMENT CONTROL

Date Revision History Prepared By: Reviewed and

Authorised by:

19/05/2015 Initial Report Domeniki Tsagaris Moussa Zaioor

03/06/2015 Version 1 Domeniki Tsagaris Moussa Zaioor

26/10/2015 Version 2 Domeniki Tsagaris Moussa Zaioor

31/10/2016 Final Report Domeniki Tsagaris Moussa Zaioor



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TABLE OF CONTENTS

Contents Page

Document Control .................................................................................................................. 2 Table of Contents ................................................................................................................... 3

1.0 INTRODUCTION ................................................................................................... 4

2.0 PART 1 – TRAFFIC NOISE ................................................................................... 4

2.1 NOISE SURVEY AND INSTRUMENTATION .................................................... 4

2.2 Acoustical Study (AS/NZS 2107:2000)................................................................... 5

2.3 Acoustical Study (AS 3671-1989) & Clause 102 of the State Environmental Planning

Policy – (Infrastructure) 2007 ............................................................................................. 6

2.4 Sleep Arousal ........................................................................................................... 7

3.0 PART 2 - AOUSTIC NOISE AND VIBRATION NEAR RAILWAY LINES ...... 8

3.1 ACOUSTICAL STUDY ............................................................................................... 8

3.2 Australian Standard 2107:2000 & Clause 87 of the SEPP ...................................... 9

3.3 NOISE SURVEY & INSTRUMENTATION ....................................................... 10

3.4 NOISE SURVEY RESULTS ................................................................................ 11

3.5 RAIL VIBRATION SURVEY.................................................................................. 11 4.0 PART 3 - AIRCRAFT NOISE .............................................................................. 12

4.1 ACOUSTICAL STUDY ........................................................................................ 12

5.0 EXTERNAL RECOMMENDATIONS ................................................................. 13

5.1 WINDOWS/SLIDERS, DOORS, EXTERNAL WALLS & ROOF ..................... 13

5.2 CAR PARK MECHANICAL VENTILATION .................................................... 13

5.3 MECHANICAL VENTILATION for RESIDENTIAL UNITS............................ 14

6.0 Discussion and Conclusion .................................................................................... 16

7.0 Appendix ................................................................................................................ 17



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1.0 INTRODUCTION

The aim of this report is to determine the building materials to be used and the construction

methods to be adopted such that the proposed development at No. 641-657 King Street,

Newtown is built to achieve acceptable internal noise levels.

Noise intrusion levels are to be within the limits adopted by the Building Code of Australia,

NSW Road Noise Policy, Clause 87 & 102 of the State Environmental Planning Policy –

(Infrastructure) 2007, the Department of Planning’s document titled “Development Near Rail

Corridors and Busy Roads – Interim Guidelines”, AS 3671 ‘Road Traffic Noise Intrusion –

Building Siting and Construction’, AS 2107 ‘Acoustics – Recommended Design Sound

Levels and Reverberation Times’, AS 2021 ‘Acoustics-Aircraft Noise Intrusion –Building

Siting and Construction’ and Marrickville Council Conditions and Requirements; such that

all habitable rooms in the proposed development shall be designed to limit internal noise

levels.

The site is located on the corner of King Street and Goodsell St, Newtown (Figure 1 – Site

Location). It is affected by traffic noise from King Street, railway noise from a rail corridor

located approximately 15 metres north of the site and by aircraft noise from Sydney Airport.

The architectural plans by BKA Architects dated the 17th

October, 2016 are for the proposed

construction of a nine (9) storey mixed use development including two (2) levels of basement

parking areas.

2.0 PART 1 – TRAFFIC NOISE

2.1 NOISE SURVEY AND INSTRUMENTATION

On May 25th

, 2015, Acoustic Noise & Vibration Solutions went to the above address to carry

out acoustic measurements near the front proposed building line facing King Street (Figure 2

– Point A - Noise Reading Location). The unattended environment noise monitoring was

conducted for seven (7) days between Monday 25th

May, 2015 and Monday 1st June, 2015.

All sound pressure levels are rounded to the nearest whole decibel. All measurements were

taken in accordance with the Australian Standards AS 1055 “Acoustics- Description and

Measurements of Environmental Noise”.

The noise survey was conducted to determine a conservative reading of the existing day and

evening noise levels [15hrs- 7:00 -22:00] L(A90, 15 minutes [1hr]) and L(Aeq, 15 minutes [1 hr]) and to

determine a conservative reading of existing night and early morning noise levels [9hrs-

22:00-7:00] L(A90, 15 minutes [1hr]) and L(Aeq, 15 minutes [1 hr]).

The measurement procedure and the equipment used for the noise survey are described

below. All sound pressure levels are rounded to the nearest whole decibel. All sound level

measurements and analysis carried throughout this report are carried with Svantek 957 Noise

and vibration level meter which has the following features:



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Type 1 sound level measurements meeting IEC 61672:2002

General vibration measurements (acceleration, velocity and displacement) and HVM

meeting ISO 8041:2005 standard

Three parallel independent profiles

1/1 and 1/3 octave real time analysis

Acoustic dose meter function

FFT real time analysis (1920 lines in up to 22.4 kHz band)

Reverberation Time measurements (RT 60)

Advanced Data Logger including spectra logging

USB Memory Stick providing almost unlimited logging capacity

Time domain signal recording

Advanced trigger and alarm functions

USB 1.1 Host & Client interfaces (real time PC “front end” application supported)

RS 232 and IrDA interfaces

Modbus protocol

Machine was calibrated prior to reading, and there was light wind and rain during the

acoustic reading period. The Full Average Statistical Noise Parameters including L(Aeq, 15

minutes) & L(A90, 15 minutes) are presented in Figure 4 – Noise Survey. A Summary of those

readings is presented in the table below:

Table 2.1- Summary of Noise Readings Monday 25

th May – 1

st June, 2015

At Point A L(Aeq, 15 minutes) L(A90, 15 minutes)

Day & Evening Time – 7:00am-

10:00pm 72 dB(A) 58 dB(A)

Night & Early Morning Time –

10:00pm-7:00am 67 dB(A) 52 dB(A)

2.2 Acoustical Study (AS/NZS 2107:2000)

The above standard has formulated the criteria for developments situated in urban areas. The

levels have been derived from relevant Australian Standards, the measurements and analysis

of noise conditions in other similar developments and standards established in completed

projects.

As traffic noise levels are not constant, a Leq noise level descriptor is used when assessing

this type of noise source. The Leq is the mean energy level of noise being measured and has

been found to accurately describe the level of annoyance caused by traffic noise.

It is usual practice, when we find it necessary to recommend internal sound levels in

buildings to refer to Australian/New Zealand Standard AS/NZS 2107:2000 “Acoustics –

Recommended Design Sound Levels and Reverberations times for Building Interiors”.



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This standard provides recommended noise levels for steady state such as noise from building

services and quasi-steady state sounds, such as traffic and industrial noise. The noise levels

recommended in AS/NZS 2107:2000 take into account the function of the area and apply to

the sound level measured within the space unoccupied although ready for occupancy. The

standard recommends the following noise levels for residential buildings.

AUSTRALIAN STANDARD AS/NZS 2107:2000 RECOMMENDED DESIGN NOISE LEVELS, LAeq

Type of occupancy Recommended Design Sound Level

Activity Satisfactory Maximum

Houses in areas with negligible transportation

Sleeping Areas 25 35

Houses and Apartments near minor roads

Living Areas 30 40


Work Areas 35 40

Apartment common areas (e.g. foyer, lift lobby) 45 55

Houses and Apartments near major roads

Living Areas 35 45


Work Areas 35 45


2.3 Acoustical Study (AS 3671-1989) & Clause 102 of the State Environmental

Planning Policy – (Infrastructure) 2007

Australian Standard 3671 “Traffic noise intrusion building siting and construction” is used to

determine the type of building materials required to satisfactorily attenuate traffic noise so

that internal traffic noise levels recommended in Australian Standard 2107-2000

“Recommended design sound levels and reverberations for building interiors” and Clause

102 of the State Environmental Planning Policy – (Infrastructure) 2007, can be achieved.

By taking in to consideration that the proposed development is considered to be “sensitive to

traffic noise or vehicle emissions”, it must be “appropriately located and designed, or include

measures, to ameliorate potential traffic noise or vehicle emissions within the site of the

development” arising from King Street.

Under Clause 102, where the development is for residential use and is located in or adjacent

to a relevant road corridor, a consent authority must not grant consent unless it is satisfied

that appropriate measures will be taken to ensure that the following LAeq levels are not

exceeded:

- in any bedroom in the building – 35dB(A) at any time between 10.00p.m. and 7.00a.m.

- anywhere else in the building (other than a garage, kitchen, bathroom or hallway) –

40dB(A) at any time.



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Maximum design sound level is defined as the level of noise that has been found to be

acceptable by most people for the environment in question and also to be not intrusive. In this

assessment, satisfactory design sound levels were used where practically possible.

In accordance with Section 3.4.2.6 of AS 3671 the traffic noise attenuation (TNAc) required

for each building component (walls, windows, ceiling,…etc) is determined from the

following equation:

TNAc = TNR + 10 log 10 [ ( Sc / Sf )x (3/h) x 2T60 x C ] ………….…………..4.1

Where TNAc = the traffic noise attenuation required of the component, in decibels.

TNR = the traffic noise reduction, determined in Clause 3.3;

Sc/Sf = area ratio of the component

h = ceiling height of room, in metres

T60 = reverberation time of room, in seconds

C = number of components.

The tables provided in the relative Australian standards for selecting building materials

(walls, windows, ceiling etc) are expressed in terms of their Rw (weighted sound reduction

index) or STC. Section 3.4.3.1 defines the relation between Rw and TNAc calculated in [4.1]

as follows:

Rw (or STC) ≈TNAc + 6 ……………………………………………………..….4.2

This formula approximate all allowances made for the spectral composition of the noise.

2.4 Sleep Arousal

Section 5.4 of the NSW Road Noise Policy mentions the Environment Protection Authority

NSW 1999 guideline which aims at limiting the level of sleep disturbance due to

environmental noise. It states that the LA1, 1 minute level of any noise should not exceed the

ambient LAF90 noise level by more than 15dB. This guideline takes into account the

emergence of noise events, but does not directly limit the number of such events or their

highest level, which are also found to affect sleep disturbance.

Applying the above thus the sleep disturbance criteria for the above project is LA1, 1 minute and

should not be exceeded by [ LA90 =52 dB(A) plus 15 ]= 67 dB(A).

There are other studies on sleep disturbance like the one carried the enHealth Council (2004)

and the guidelines published by the World Health Organisation (1999) were reviewed and

analysed in terms of the guidance on noise exposure and sleep disturbance. The enHealth

report states that:

‘ as a rule for planning for short-term or transient noise events, for good sleep over 8 hours

the indoor sound pressure level measured as a maximum instantaneous value not exceed

approximately 45 dB(A) LA,(Max) more than 10 or 15 times per night’.



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3.0 PART 2 - AOUSTIC NOISE AND VIBRATION NEAR RAILWAY LINES

3.1 ACOUSTICAL STUDY

The proposed development is to comply with the Department of Planning’s document titled

“Development Near Rail Corridors and Busy Roads – Interim Guidelines” as it is located

approximately 15 metres north of a railway corridor.

The noise criteria for residential buildings in Table 2.1 for both road and rail are specified in

the Infrastructure SEPP. Other values in Table 3.1 are based on the Environmental Criteria

for Road and Traffic Noise (EPA1999).

Table 3.1 - Noise Criteria

Residential Buildings

Type of occupancy

Noise Level

dBA

Applicable time

period

Sleeping areas (bedroom) 35

Night 10 pm to 7

am

Other habitable rooms (excl. garages,

kitchens, bathrooms & hallways) 40 At any time

Section 3.6.2 – Ground-borne Noise of the above mentioned standard states that residential

buildings should be designed such that the 95th

percentile of train pass-bys complies with the

rail noise criterion for day and night time periods as below.

Daytime period indoor rail noise levels for sleeping and living areas is an LAmax limit

of 40dB(A).

Night time period indoor noise levels for living and sleeping areas is an LAmax limit

35dB(A).

Ground borne noise is calculated as LAmax (slow) which refers to the maximum noise level

not exceeded for 95% of rail pass-by events and is measured using the ‘slow’ response setting

on a sound-level meter.

Ground-borne noise from rail operations can be generated when ground-borne vibration

produced by a rail vehicle pass-by is re-radiated as noise inside a building by the building

structure. The causes of ground-borne noise from rail operations are therefore the same as

those of ground-borne vibration.

In our situation ground-borne noise is not normally noticeable as it is at a much lower level

than the level of air-borne noise from rail pass-bys. Ground-borne noise may cause

annoyance when there is no significant air-borne noise affecting a residence, such as where

noise sensitive receivers are located above underground railways or in a mixed-use building

integrating rail infrastructure.



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In addition floor vibration levels in habitable rooms should comply with the criteria in British

standard BS6472-1:2008 Evaluation of Human Exposure to Vibration in Buildings (1Hz to

80 Hz).

Further, when windows and doors are left open, indoor sound levels should not exceed the

nominated noise criteria by more than 10 dB(A). If noise levels exceed the nominated rail

noise criteria by more than 10 dB(A), then the provision of mechanical ventilation should be

incorporated in the design of the building.

3.2 Australian Standard 2107:2000 & Clause 87 of the SEPP

It is usual practice, when we find it necessary to recommend internal sound levels in

buildings to refer to Australian/New Zealand Standard AS/NZS 2107:2000 “Acoustics –

Recommended Design Sound Levels and Reverberations times for Building Interiors”.

This standard provides recommended noise levels for steady state such as noise from building

services and quasi-steady state sounds, such as traffic and rail noise. The noise levels

recommended in AS/NZS 2107:2000 take into account the function of the area and apply to

the sound level measured within the space unoccupied although ready for occupancy.

The standard recommends the following noise levels for residential buildings.

AUSTRALIAN STANDARD AS/NZS 2107:2000 RECOMMENDED DESIGN NOISE LEVELS, LAeq

Type of occupancy Recommended Design Sound Level

Activity Satisfactory Maximum

Houses in areas with negligible transportation


Houses and Apartments near minor roads

Living Areas 30 40


Work Areas 35 40


Houses and Apartments near major roads

Living Areas 35 45


Work Areas 35 45


Similarly, Clause 87 of the SEPP states that where the development is for residential use and

is located in or adjacent to a rail corridor, a consent authority must not grant consent unless it

is satisfied that appropriate measures will be taken to ensure that the following LAeq levels

are not exceeded:

- in any bedroom in the building – 35dB(A) at any time between 10.00p.m. and 7.00a.m.

- anywhere else in the building (other than a garage, kitchen, bathroom or hallway) –

40dB(A) at any time.



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3.3 NOISE SURVEY & INSTRUMENTATION

On the 25th

May, 2015, I/We went to the above address to carry out acoustic measurements

near the building line of the proposed development facing the railway line (Figure 2 – Noise

Reading Location Point B). The measurement procedure and the equipment used for the

noise survey are described below. All sound pressure levels are rounded to the nearest whole

decibel.

All sound level measurements and analysis carried throughout this report are carried with

Svantek 957 Noise and vibration level meter which has the following features:

Type 1 sound level measurements meeting IEC 61672:2002

General vibration measurements (acceleration, velocity and displacement) and HVM

meeting ISO 8041:2005 standard

Three parallel independent profiles

1/1 and 1/3 octave real time analysis

Acoustic dose meter function

FFT real time analysis (1920 lines in up to 22.4 kHz band)

Reverberation Time measurements (RT 60)

Advanced Data Logger including spectra logging

USB Memory Stick providing almost unlimited logging capacity

Time domain signal recording

Advanced trigger and alarm functions

USB 1.1 Host & Client interfaces (real time PC “front end” application supported)

RS 232 and IrDA interfaces

Modbus protocol

In addition to freight trains, the railway corridor services the T3 Bankstown Line. A

conservative representation of determining LAeq is to record readings during peak hours,

mainly 8:00- 9:00 am / 6:00-7:00 am (Mainly Passengers) & 10:00 p.m - 2:00 a.m (Mainly

Freight).

Another method is to carry readings for pass-by trains recording the duration, and LAeq of

each pass–by. To calculate the LAeq,T for a period based on measurements of all pass-bys

during that period then the following equation is used:

LAeq,T = 10 x 𝑙𝑜𝑔10 (∑ 𝑝𝑖 ×100.1×𝐿𝑖

𝑇𝑃)

Where:

pi is the duration of each pass-by, in seconds

Li is the LAeq noise level of the pass-by over that duration

Tp is the duration of the total assessment period (T) in seconds



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3.4 NOISE SURVEY RESULTS

Noise levels were measured adjacent to the railway corridor (Figure 2 – Point B) between

8.00 am and 9.00 am to determine a conservative sample of the LAeq, 1 hour (daytime) and

between 10:00pm and 2:00am to determine a conservative sample of the LAeq, 1 hour

(nighttime).

There were 14 predominately commuter train pass-by movements during the daily hour and

10 during the night hours. Each train pass-by was generally audible for up to 40 seconds. The

external rail noise levels are listed below.

Table 3.4 - Rail Noise Survey Results, Noise Criteria and Noise Reduction Required

3.5 RAIL VIBRATION SURVEY

The floor vibration levels in habitable rooms should comply with the criteria in British

Standard BS 6472-1:2008 Evaluation of Human Exposure to Vibration in Buildings (1 to 8

Hertz). The proposed development is to be located approximately 15 metres away from the

corridor rail line. BS 6472-1:2008 considers the eVDV levels for daytime and night time.

The probability of adverse effects will be low when the eVDV is less than 0.4 during the

daytime and less than 0.24 for the night time periods.

The calculated eVDV found to be 0.18 during the daytime and 0.12 during the night time.

During these train movements, ground vibration levels were only just noticeable to the touch

of the palm of the hand. The palm of the hand can perceive ground vibrations as low as

0.3mm/s. Based on the survey results, vibration levels are well within the low probability of

adverse effects. Any vibration emission will not cause building damage to the proposed

development.

Calculations are as follows:

eVDV = 1.4 × a rms × t 0.25

a rms = weighted rms acceleration of train (m/s2); average = 14mm/sec2= 0.014m/sec2.

(varies between 13 & 15 mm/sec2)

t in sec= total cumulative time of the vibration; say an average of 12 train passes per hour

for 12 hrs (1day) & each train pass is felt for 40 seconds.

Thus t = 14*40*12=6720 secs.

eVDV (day) = 1.4 × 0.014 × (6720) 0.25

eVDV (day) = 0.18 < 0.4 Ok.

At Point B At Point B

LAeq dB(A), 7:00am – 10:00pm

(Conservative Sample)

LAeq dB(A), 10:00pm – 7:00am

(Conservative Sample)

Outdoor

Rail Noise

Noise

Criteria

Noise

Reduction

Outdoor

Rail Noise

Noise

Criteria

Noise

Reduction

63 40.0 23 58 35.0 23



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Similarly eVDV for night time (say 2.5 train passes per hour for 12 hrs & each train pass is

felt for 40 seconds)

eVDV (night) = 0.12 < 0.24 therefore Ok.

4.0 PART 3 - AIRCRAFT NOISE

4.1 ACOUSTICAL STUDY

The site is located north-east of Sydney Airport, between the NEF 20 and NEF 25 contours.

According to Table 2.1 of the above code, any home unit development is not usually

permitted. Note 4 under Table 2.1 states that 'This Standard does not recommend

development in unacceptable areas. However, where the relevant planning authority

determines that any development may be necessary, it is recommended that such

development should achieve the required ANR determined according to Clause 3.2’. The

noise attenuation proposed in this report and the building components treatments described

below will result in a residence that is more acoustically sound than surrounding houses and

existing residence.

All aircraft noise attenuation to be expected from the proposed construction is determined in

accordance with Clause 3.2. Maximum allowable indoor noise level as determined from

Table 3.3 is 50dB(A) for relaxing and sleeping areas, 60dB(A) for toilets and kitchen.

DT, DL, DS determined as per Figure 3.1 page 15 of the above code are as follows:

East - West Runway (metres)

DS 1371

DL 2165

DT 6280 Figure 3 – Critical Runway

The maximum aircraft noise level as determined from Table 3.6 is 75 dB(A) for Boeing 747-

200B for Long-Range Take-Off (North - South Runway). See Figure 8.

The Aircraft Noise Reduction, in sleeping areas and dedicated lounges is 75-50= 25 dB(A)

The Aircraft Noise Reduction in any other habitable spaces is 75-55= 20 dB(A)

The Aircraft Noise Reduction in bathrooms, toilets and laundries 75-60= 15 dB(A)



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5.0 EXTERNAL RECOMMENDATIONS

5.1 WINDOWS/SLIDERS, DOORS, EXTERNAL WALLS & ROOF

Building Component Rw

Rating to

be

Achieved

Windows in Commercial Tenancy are to be 12.5mm Viridian Vlam Hush glass

with full perimeter Schlegel Q-Lon acoustic seals (Ph: 8707-2000) 36-38

Windows & Sliders in Dining/Living/Kitchen & Bedroom Areas of all Units

facing King St & Goodsell St on the 1st Floor – 4

th Floor are to be double glazed

system that is 10mm laminated with 50mm air gap then 10mm laminated with full

perimeter Schlegel Q-Lon acoustic seals (Ph: 8707-2000) or a 6mm laminated

secondary window/slider followed by a min 6mm window at a 100mm gap.

39-42

Windows & Sliders in Dining/Living/Kitchen & Bedroom Areas of all Units

facing King St & Goodsell St on the 5th

Floor – 8th

Floor are to be 10.5mm

Viridian Vlam Hush glass with full perimeter Schlegel Q-Lon acoustic seals (Ph:

8707-2000)

38-40

All other Windows & Sliders in Dining/Living/Kitchen & Bedroom Areas of

all other Units are to be 10mm laminated type with full perimeter Schlegel Q-Lon

acoustic seals (Ph: 8707-2000)(1)

33-36

Windows in Bathrooms/Ensuites/Laundries etc of all units are unrestricted and

to be in accordance with AS 2047 (Windows in Buildings). (1).

-

External Walls are to be Double skin cavity brick walls, brick veneer minimum

270/250 mm double brick/brick veneer construction or any other method of wall

construction with an Rw of 44.

44-46

Roof is to be a minimum 150mm Concrete Roof, on 13mm gypsum plaster board

ceiling with 50mm thick, 15kg/m³ mineral wool batts. 40-44

NB: This report is to be read in conjunction with the BASIX certificate and any other related building specification. (1).

No weep holes in windows/sliders. All gaps between window & door frames and the masonry walls are to be

sealed using acoustic foam Hilti CP620 or similar. Glass wool batts can be applied prior to the application of the

foam to seal larger gaps. (2).

All gaps are to be acoustically sealed.

5.2 CAR PARK MECHANICAL VENTILATION

The proposed two (2) levels of basement parking at No. 641-657 King St, Newtown are

located below ground level and that makes providing natural ventilation not possible and a

mechanical extract system should be used. The mechanical ventilation system needs to

achieve six air changes per hour for exhaust fume extract and ten air changes per hour for

smoke clearance.

The noise from proposed mechanical plant is governed under Section 2.1 of the NSW

Industrial Noise policy. Noise intrusion from the mechanical plant & equipment is generally

considered acceptable if the weighted level of noise from the source measured over a 15

minutes interval does not exceed the rating background noise level (RBL) by more than 5dB

at the boundary of the nearest residential receiver



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LAeq,15 minutes < rating background level + 5

Section 3.1 of the above policy defines the background level as LA90,15 minutes which is the

Noise exceeded 90% percent of a time period over which annoyance reactions may occur

(taken to be 15 minutes). The RBL is defined as the overall single-figure LA90,15 minutes

background level representing each assessment period (day/evening/night) over the whole

monitoring period. Background noise levels in the area are governed by traffic noise from

King St, railway noise from the nearby Railway Line and aircraft noise from Sydney Airport.

To achieve compliance with the nominated noise criteria, the following noise mitigation

measures are recommended:

MECHANICAL PLANT RECOMMENDATIONS

Car Park Supply air Install a silencer Min 2D (E29/90)1

or

Equivalent.

Car Park Exhaust Fan

Provide silencer before and after Fan.

Silencer Min 2D (E29/90)1

or Equivalent.

Lagged duct with min 38mm 32 kg/m3

acoustic insulation a minimum 10 metres into

the car park

Note:

1. All silencers should be placed 1 to 2 duct diameter distance away from the fans.

Specifications of silencers/acoustic louvers are provided in Table below

Insertion Loss of Recommended Silencers [dB]

FREQUENCY [Hz] 63 125 250 500 1000 2000 4000 8000

Attenuator/Silencer 6 11 18 31 36 27 24 17

Alternative attenuator/silencer or acoustic louvers can be considered provided that the

insertion loss values are equal or greater than the values specified in the Table above.

Once the development application for the proposed development has been approved and a

Mechanical Services Plan has been prepared, further acoustic assessment is to be carried out

for the proposed mechanical plant in order to achieve compliance with the above listed

criteria. This will be achieved through the use of silencers and/or lagging of ducts, if

necessary. A qualified acoustical consultant may be required to progressively inspect the

installation of various suppression components and certify to council that it meets

installation.

5.3 MECHANICAL VENTILATION for RESIDENTIAL UNITS

To achieve the indoor design sound levels required to habitable areas, it is assumed that the

windows and doors are closed to avoid noise intrusion. Habitable Areas should not exceed 40

dB(A) during day the while bedrooms are not to exceed 35 dB(A) during the night.

Windows openable by 20% cause a 10 dB(A) reduction between the internal and external

noise levels. The “Development near Rail Corridors and Busy Roads – Interim Guideline”



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page 19, Section 3.6.1 states that “If internal noise levels with windows or doors open exceed

the criteria by more than 10 dB(A), the design of the ventilation for these rooms should be

such that occupants can leave windows closed, and also to meet the ventilation requirements

of the Building Code of Australia.”

Applying the above for the proposed development, we recommend that mechanical or natural

ventilation is required for all residential units facing King St for the proposed development at

No. 641-657 King St, Newtown.

Specific ventilation requirements are outside of our scope of expertise; however an

acoustically insulated building must be kept virtually air tight to exclude external noise.

Therefore mechanical ventilation, noise absorbing ventilators or air-conditioning are needed

to provide fresh air and to control odours.

Requirements for ventilation are given in the Building Code of Australia (BCA) under

Section 3.8.5. Indoor air quality is given in Australian Standard AS 1668.2 - 2002, “The use

of ventilation and air-conditioning in buildings - Ventilation design for indoor air

contaminant control”. The following are typical ways to achieve ventilation through the

property with windows closed:

1. Ducted Air-Conditioning System where the Fan Coil Units provide outside air mixed

with the return air is always considered as a first option. Ductwork and plenums must

be acoustically treated.

2. A device similar/equivalent to the Aeropac Room Ventilator and Air-Filter is fitted to

the required rooms.

3. Silenceair external wall vents, together with upgraded toilet and laundry fans to

provide forced flow-through ventilation. The fans in this case must be operating

whenever external doors/windows are closed (available from www.silenceair.com)

4. Fresh air fan system to draw air from the façade with no view of the main road into

the residence could also be used.



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6.0 Discussion and Conclusion

As the acoustical study above shows, we certify that the internal noise attenuation levels for

the proposed development at No. 641-657 King Street, Newtown will satisfy the

requirements of the Building Code of Australia, AS 3671 ‘Road Traffic Noise Intrusion –

Building Siting and Construction’, AS 2107 ‘Acoustics – Recommended Design Sound

Levels and Reverberation Times’, AS 2021 ‘Acoustics-Aircraft Noise Intrusion –Building

Siting and Construction’, Clause 102 of the State Environmental Planning Policy –

(Infrastructure) 2007, NSW Road Noise Policy, NSW Department of Planning’s

‘Development near Rail Corridors and Busy Roads – Interim Guideline’, Marrickville

Council conditions and requirements; provided that the above recommended materials are

used in construction.

The internal noise levels in the proposed development will enable reasonable amenity for the

occupants.

We hope this report meets your requirements. Should you require further explanations, please

do not hesitate to contact us.

Yours Sincerely,

M. Zaioor

M.S. Eng’g Sci. (UNSW).

M.I.E.(Aust), CPEng

Australian Acoustical Society (Member)



17

7.0 Appendix

Figure 1 Site Location .............................................................................................................. 18 Figure 2 Noise Reading Location ............................................................................................ 19 Figure 3 Critical Runway ......................................................................................................... 20

Figure 4 Noise Survey ............................................................................................................. 21



18

Figure 1 Site Location



19

Figure 2 Noise Reading Location

Point A – Noise

Reading Location

Point B – Noise

Reading Location



20

Figure 3 Critical Runway

DS

DL

DT



21

Figure 4 Noise Survey

0

10

20

30

40

50

60

70

80

90

100

16

:45

:00

21

:30

:00

2:1

5:0

0

7:0

0:0

0

11

:45

:00

16

:30

:00

21

:15

:00

2:0

0:0

0

6:4

5:0

0

11

:30

:00

16

:15

:00

21

:00

:00

1:4

5:0

0

6:3

0:0

0

11

:15

:00

16

:00

:00

20

:45

:00

1:3

0:0

0

6:1

5:0

0

11

:00

:00

15

:45

:00

20

:30

:00

1:1

5:0

0

6:0

0:0

0

10

:45

:00

15

:30

:00

20

:15

:00

1:0

0:0

0

5:4

5:0

0

10

:30

:00

15

:15

:00

20

:00

:00

0:4

5:0

0

5:3

0:0

0

10

:15

:00

15

:00

:00

No

ise

Le

vel (

A)

Average Statistical Noise Level 25th May, 2015 - 1st June, 2015

LAeq [dB]

L01 [dB]

L10 [dB]

L90 [dB]

acoustic report traffic, aircraft noise & rail noise ...€¦ · acoustic report for no....

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