07/2398 - Request for information response [As Published] · 132007.2398

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64.1 dB(A) facade reflected. It is noted that the primary noise source at this location is road traffic and
not passing trains.

All units are further away from the road and rail, so that the Leq(24hour) at the facades would be
below 64.1 dB(A).

8 Internal Areas

The level of noise control required for the units was assessed with respect to Australian Standard
AS3671 - 1989 “Acoustics - Road traffic noise intrusion - Building siting and construction”.

As noted previously, the required interna! noise levels due to road traffic for residential buildings are
an Leq(! hour) maximum of 45 dB(A) and 40 dB(A) for the day and night respectively.

For railway noise the internal noise limits are an Lmax of 50 dB(A) in bedrooms and 60 dB(A) in living
rooms,

Using the methodology contained in AS3671-1989 “Acoustics — Road traffic noise intrusion — Building | i
siting and construction” the required Traffic [Noise Reduction TNR construction category was !
determined in accordance with Section 3 of AS3671. :

The Australian Standard AS3671 contains the following definition for construction categories.

Category |. Standard construction; openings including open windows and doors may comprise up .
to 10% of the exposed facade. TNR of approximately 10 dB(A) is expected. ee

Category 2. Standard construction, except for lightweight elements such as fibrous cement or metal .
cladding or all-glass facades. Doors, windows and all other openings must be closed. TNR of
approximately 25 dB(A) is expected.

Category 3. Special construction, chosen in accordance with Clause 3.4. Windows, doors and other
openings must be closed. TNR between 25 and 35 dB(A) is expected.

Category 4. TNR greater than 35 dB(A) is required; special acoustic advice should be sought.

The minimum construction details for the development are shown in Table 8.1.

Appendix A contains the predicted external noise levels due to road and rail traffic. It also shows the
TNR required to meet the internal noise limits due to both road and rail traffic. As is standard
practice, the TNR for rail traffic was calculated by adding 6 dB(A) to the calculated requirements to
allow for the low frequency components.

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