img-730171023-0001-2 · MCU12/0012

Noosa Quad Bike Tours
Environmental Noise Level Assessment of Quad Bike Rider Competency Assessment Circuit,
298 Tablelands Road, Cooran Page 6 of 21

SOURCE NOISE LEVEL

April 2012

With one quad bike using the competency assessment circuit at a speed representative of a person
who has previously ridden a quad bike (experienced rider), a noise assessment was conducted at 10
metres from the closest part of the circuit in April 2012. Sound level meter sampling rate was set to 2
second intervals, to ensure that all events were measured. Refer Appendix A details the
measurement equipment, equipment settings, calibration, monitoring location and atmospheric
conditions and Appendix B for a complete set of results.

Whilst the quad bikes will all be governed (controlled to a maximum number of revs), a noise
assessment was also conducted with the quad bike ungoverned to determine any difference in the
noise level.

From Appendix B the following noise levels should be noted:

e quad bike governed, first set of circuits: 63.1 dB(A) Laio,r average;
quad bike governed, second set of circuits: 64.1 dB(A) Laio,r average;
e quad bike ungoverned, doing circuits: 62.9 dB(A) Laio,r average.

As the quad bike will be governed for all Noosa Quad Bike Tour riders, the adopted source noise level
for one quad bike is the average of the governed results, namely 63.6 dB(A) Lato.

July 2012

In July 2012 a further noise assessment was conducted of one quad bike being ridden on the
competency assessment circuit, firstly by an experienced rider, then an inexperienced rider. The
results of these noise assessments were:

e experienced rider: 62.4 dB(A) Lacqt, 66.2 dB(A) Lato,r and 56.6 dB(A) Laso,r;
¢ inexperienced rider: 59.3 dB(A) Laeqt, 62.8 dB(A) Lato,r and 49.2 dB(A) Lago,t-

accordance with the Ecoacces$ Guideline Planning for Noise Control, Appendix A: Determination of
Tonal Adjustment (K;). Calculation resulted in tonal adjustments of 0 dB( for the experienced rider
and 1.1 dB(A) for the inexperienced rider, as per Table 3.

For these two assessments of ire Par from the 1/3 Octave4requency spectrum data in

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David Moore & Associates Pty Ltd Our reference: R12054/D2670/Rev. 1/23.07.2012