Noise Report

Medicentre 2 Pty Ltd ATF Medicentre Properties No 2 Trust
Environmental Noise Level Impact Assessment for Proposed Medical Centre, 45 Maple Street, Cooroy           Page 10 of 20




        car engine starting:                  39 dB(A) LAeq,qdj,1H + 8 (distance) – 8 (acoustic barrier) = 39
                                               dB(A) LAeq,qdj,1H;
                                               46 dB(A) LA1,adj,1H + 8 – 8 = 46 dB(A) LA1,adj,1H;
                                               42 dB(A) LA10,adj,1H + 8 – 8 = 42 dB(A) LA10,adj,1H

        people laughing, talking, etc:        52 dB(A) LAeq,adj,1H – 4 (distance) – 8 (acoustic barrier) = 40
                                               dB(A) LAeq,adj,1H;
                                               58 dB(A) LA1,adj,1H – 4 – 8 = 46 dB(A) LA1,adj,1H;
                                               55 dB(A) LA10,adj,1H – 4 – 8 = 43 dB(A) LA10,adj,1H;

        SRV driving:                          45 dB(A) LAeq,adj,1H + 4 (distance) – 8 (acoustic barrier) = 41
                                               dB(A) LAeq,adj,1H;
                                               52 dB(A) LA1,adj,1H + 4 – 8 = 48 dB(A) LA1,adj,1H;
                                               48 dB(A) LA10,adj,1H + 4 – 8 = 44 dB(A) LA10,adj,1H;

        SRV unloaded:                         50 dB(A) LAeq,adj,1H + 4 (distance) – 8 (acoustic barrier) = 46
                                               dB(A) LAeq,adj,1H;
                                               58 dB(A) LA1,adj,1H + 4 – 8 = 54 dB(A) LA1,adj,1H;
                                               53 dB(A) LA10,adj,1H + 4 – 8 = 49 dB(A) LA10,adj,1H.

        waste collection:                     65 dB(A) LAeq,adj,1H – 13 (distance) – 8 (acoustic barrier) = 44
                                               dB(A) LAeq,adj,1H;
                                               72 dB(A) LA1,adj,1H – 13 – 8 = 51 dB(A) LA1,adj,1H;
                                               68 dB(A) LA10,adj,1H – 13 – 8 = 47 dB(A) LA10,adj,1H;

        Air-conditioning:                     62 dB(A) LAeq,adj,1H – 16 (distance) + 5 (three units) + 6
                                               (reflection) – 25 (underground basement) = 30 dB(A) LAeq,adj,1H;
                                               64 dB(A) LA1,adj,1H – 16 + 5 + 6 – 25 = 32 dB(A) LA1,adj,1H;
                                               63 dB(A) LA10,adj,1H – 16 + 5 + 6 – 25 = 31 dB(A) LA10,adj,1H.

The daytime and evening noise criteria is that the following noise levels should not be exceeded:

        50 dB(A) LAeq,adj,1H;
        55 dB(A) LA10,adj,1H; and
        65 dB(A) LA1,adj,1H;

All of the above noise criteria are complied with at the closest residence to the south, provided that
there is an acoustic barrier on the common boundary with this residence. This acoustic barrier must
provide a noise level reduction of at least 8 dB(A).


NOISE CONTROL

To control the noise from the subject site to the closest residential, no additional noise control measures
are required for the closest residence to the east, but an acoustic barrier is required for the closest
(adjoining) residence to the south. This acoustic barrier must provide a noise reduction of at least 8
dB(A).

By path difference calculation an acoustic barrier 1.5 metres high on top of the retaining wall will provide
the required noise reduction. This acoustic barrier must be located as per Figure 4, be continuous and
gap free and have a minimum surface area density of 12.5 kg/m 2. The height of this acoustic barrier is
referenced to the top of the retaining wall.




David Moore & Associates Pty Ltd                                               Our reference: R20018/D3464/Rev.0/9.03.20