Apart from inadequacy of dB(A) measurement to identify the acoustic signature of wind farm noise the provision of averaging techniques by use of regression curves related to hub height wind speeds are of no assistance to the community in determining acoustic compliance. Furthermore the frequency limitation of various sound level meters automatically restricts the provision of appropriate noise data related to turbine operations. A further issue of concern relates to the noise floor of the measurement system that by the (intentional or unintentional) selection of microphones can render the measurements of no assistance. Examination of different analysis parameters, instrumentation frequency response and microphone noise floors is provided to identify the above anomalies.
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