Released under the Right To Information (RTI) Act 2009 - EHP
Comments by Queensland Government Noise Expert - Dr Antoine David
26 August 2015
Bullet points for Draft Wind Farm State Code acoustics review
- Acoustics problem associated with wind farms are due to the infrasonic and low frequencies harmonics and their interaction between several turbines. Those generates [sic] annoyances and to higher intensities health effects.
- By using both a time average and frequency weighting, by definition, all those harmonics disappear and as such no assessments of the impact of those harmonics can be made.
- To assess those harmonics, it is necessary to use unfiltered data and no time average.
- The low frequencies and infrasound effects cannot be assessed by dBA. By designed, the A filtering process takes away low frequency and infrasound. Low frequencies and infrasound need to be assessed by dBlin which is unfiltered data according to frequency.
- Annoyance has not been considered in either guideline.
- Wind masking has been applied as if it was masking noise of similar frequencies and this is not the case.
- The distance of 1500m as a buffer will not be sufficient for the current size of wind turbine. This distance had originated years ago for much smaller size turbines and at the time was probably a correct distance.
- The noise criteria proposed in the draft wind farm state code is most likely not protect residents for their health and well-being and will not protect their environmental values.
- It is uncertain and unlikely that the noise criteria proposed in the draft wind farm state code will protect animals such as farmed animals for their health and well-being from low and infrasonic noise exposure.
Dr Antoine David PhD MEng MAAS
Technical Specialist (Noise)
Technical Support Unit | Regulatory Capability and Customer Service
Department of Environment and Heritage Protection
400 George Street
Brisbane QLD 4000