Noise Report [As Published] · 132007.2398

RSL Care =

Proposed RSL Retirement Village, Cooroy —- Road and Rail Noise Assessment =

 

4.4 MODELLING ASSUMPTIONS

As identified on Figure 2, the retirement village is proposed to have both single-storey and
two-storey residential housing or apartments. Noise level predictions assume a receptor
height of 2.0 m and 5.0 m above the existing ground level for ground floor and first floor
housing respectively.

A noise source height of 0.5m is adopted for vehicles on the Cooroy Connection Road.
Variations in speed (and therefore traffic noise) were determined by the model in accordance
with the corrections described in CoRTN (1988) based on the road gradient and percentage
of heavy vehicles in the fleet being considered.

4.5 NOISE PREDICTIONS

4.5.1 Introduction

Noise predictions were undertaken for 2018 as required by the Queensland Department of
Main Roads. The following sections discuss in detail the results of the noise modelling and
the predicted compliance.

45.2 Model Validation

Comparison of the monitoring results with the predicted receptor noise levels for existing
traffic levels indicates that the modelling is over-predicting by up to 1.8 dB(A), as shown in
Table 4.2 below.

TABLE 4.2: VALIDATION OF CALCULATIONS

 

Receptor 2007 Predicted 2007 Measured Accuracy

 

 

 

 

 

Monitoring 66.3 64.5 +18

 

This prediction is within the 2 dB(A) variation specified in the DMR’s Road Traffic Noise
Management: Code of Practice. Hence the noise model has been considered valid for the
purposes of this acoustic assessment.

4.5.3 Predicted Noise Levels
Table 4.3 presents a summary of predicted noise levels for 2018 predicted traffic levels.

TABLE 4.3: SUMMARY OF PREDICTED FACADE NOISE LEVELS (FREE-FIELD)

 

 

 

Receptor 2018 Lio (18 houn, AB(A) ‘* Predicted Noise Levels
1 69.6
2 63.0

 

 

 

 

 

AIR NOISE ENVIRONMENT PTY LTD
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