MCU15/0086 - Acoustic Report - Village Bicycle - 2 Bottlebrush Ave, Noosa Heads

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3.2 Sound Power Level of Noise Sources

3.2.1 Speakers

The sound power level ofthe speaker (point source) was determined using the sound pressure levels
measured 3 metres in front of the speaker (presented in Table 2.2). The sound power level of the
speaker is presented in Table 3.1.

                                        Table 3.1 Sound Power Levels of Speaker
                         Frequency
                                          63    125     250    500     1,000     2,000   Tolal
                                (Hz)
                             Leo
                                          74     87     91      90      97        97      101
                            dB(A)
                                loq
                                          99    103     100     93      97        96      107
                           dB(C)
                             Leo
                                          100   103     100     93      97        96      107
                           Linear



3.2.2 Patron Noise

Patrons were modelled as individual point sources with a typical sound power spectrum for raised
human voice', as presented in Table 3.2.

                                        Table 3.2 Sound Power Levels of Patron
                        Frequency
                                          63    125     250    500     1,000     2,000   Tolal
                            (Hz)
                                loq
                                          48     59     70      75      72        64      78
                            dB(A)


A typical number of patrons were included in the model in accordance with the observations at the
restaurant during the busy operating time of 8:30pm on the 2nd of May 2015 (Saturday). In the
Sound PLAN model point sources were located at a height of 1.5m above ground level, equivalent to
patrons standing, which is the worst case scenario with regards to noise emissions over the existing
acoustic fence.

The locations of the patrons, as considered in the SoundPLAN model, are presented in Figure 3.4.




3 Based on sound power spectrum from ANSI 3.5-1997 American       National Standard - Methods    for Calculation   of the
Speech Intelligibility Index.
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Client:    One Free Ride Trust                                                                             Page 13
Doc No.: ATP150314-R-NIA-2
Doc TItle: Noise Impact Assessment