MCU10/2083 Development Application part 2 - Attachment 6 - Noise Impact Assessment Report

Proposed Commercial Development
37 Gibson Street Noosaville
ENVIRONMENTAL NOISE IMPACT ASSESSMENT
26906 R06 37 Gibson Rd Noosaville ENV
© TTM Consulting Pty Ltd 2010




7. ANALYSIS
7.1. Source Noise Levels
Table 4 shows the source levels that form the basis of the noise predictions.

                                                 Table 4: Source noise levels

                                            Measured Level                 Correction          Corrected Level
   Noise Source
                                           dB(A) LAmax at 1m             Factor dB(A)*          LAmax (dB(A))
   Car door closure                               77                     + 2 (impulsive)             79
   Car starting                                   79                     + 2 (impulsive)             81
   Car bypass @ 5 km/h                            78                           N/A                   78
   Goods Delivery                                 85                           N/A                   85
   Waste collection                               92                     + 2 (impulsive)             94
   Conversation                                   75                           N/A                   75
    Small bin lid closure                         77                     + 2 (impulsive)             79
 *Correction due to tonality and impulsiveness as per AS1055:1997.

7.2. Predicted Noise levels
The source levels from Table 4 are used to determine the noise predictions at the nearest
affected receivers. The following corrections were applied in calculating the predicted noise
impacts:

           Distance correction at -6dB per doubling of distance from the source
      (i.e. 20 × Log(source distance m /receiver distance m).
       Most likely source locations were determined from the proposed site plan (i.e. car spaces,
      etc).
       Barrier reductions were determined with a path difference calculation.                         2.8m was the
      assumed height of the proposed building.

Point source calculations are displayed in Appendix C.

                         Table 5: Predicted noise impact levels from onsite activities to Receiver 1

                                       Predicted Level dB(A)
                                                                     Assessment Criteria Complies (Yes/No)
                                               LAmax
          Noise Source
                                                                         Day            Evening            Sleep
                                         Façade         Internal
                                                                       60dB(A)          54dB(A)           45dB(A)
   Car Door Closure                         47             42            Yes              Yes               Yes
      Car Passby                            49             44            Yes              Yes               Yes
       Car Start                            47             42            Yes              Yes               Yes
        Delivery                            53             48            Yes              Yes             +3 dB(A)
    Waste collection                        62             57          +2 dB(A)         +8 dB(A)          +12 dB(A)
     Conversation                           43             38            Yes              Yes               Yes
Conversation from nearest
                                            43             38             Yes              Yes              Yes
       boundary
  Small bin lid closure                     38             33             Yes              Yes              Yes




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