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Page | 097 2023-09-18 ORDINARY MEETING OF COUNCIL - OPEN COUNCIL ATTACHMENTS - Agenda
4.0 NOISE ASSESSMENT
4.1 Noise modelling method
A 3-dimensional computer model was created in the environmental noise modelling program SoundPLANnoise v9.0 to predict noise levels from the proposed development. The noise model has been used to calculate noise levels at the nearest noise-affected premises in accordance with ISO-9613-2:1996 Acoustics – Attenuation of sound during propagation outdoors – Part 2: General method of calculation (ISO 9613-2). The noise model enables the calculation of noise levels over a wide area, and accounts for key considerations including site arrangement, terrain, and atmospheric conditions.
The ISO 9613-2 standard specifies an engineering method for calculating noise at a known distance from a variety of sources under meteorological conditions that are favourable to sound propagation.
To calculate far-field noise levels according to the ISO 9613-2, the noise levels of each source are firstly characterised in the form of octave band frequency levels. A series of octave band attenuation factors are then calculated for a range of effects including:
• Geometric divergence
• Air absorption
• Reflecting obstacles
• Screening
• Ground reflections.
The octave band attenuation factors are then applied to the noise data to determine the
corresponding octave band and total calculated noise level at relevant receiver locations.
The conceptual location of proposed equipment items within Stage 1 of the BESS is shown in Appendix B. Details of the exact arrangement are subject to final detailed design. Note that alternative arrangement of equipment, or changes to equipment selections may lead to predicted noise levels and compliance outcomes that differ to those presented in this report.
Topography for the site has been sourced from publicly available data from Geoscience Australia (Elvis: https://elevation.fsdf.org.au, accessed 12 May 2023).
Further information with respect to the noise modelling method is provided in Appendix C.
4.2 Noise data
Based on information provided by NEOEN, noise generating equipment associated with the BESS project is understood to be limited to:
• Combined battery and inverter system
• MV Transformers
• HV Transformers
Rp 001 20220441 - Great Lakes Big Battery - Environmental Noise Assessment
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Attachment 11.6.7 Attachment 3 Great Lakes Big Battery - Environmental Noise Assessment
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