Dynamic measurements of wind turbine acoustic signals, employing sound quality engineering methods considering the time and frequency sensitivities of human perception

摘要

A set of binaural time-recordings and analyses of wind turbine noise outside and inside aresidence in Huron County, Michigan, made over two days and the intervening night inDecember 2009, is presented, centering on analysis at the time/frequency resolutions ofhuman hearing according to the well-established practices of sound quality engineeringand Soundscaping. The purpose of this paper is to present wind turbine acousticmeasurements at these time-frequency scalings and to suggest that such consideration,frequently neglected in favor of frequency resolution and long-term level averages, couldaugment the perceptually inappropriate averages (often A-weighted) typically taken overmuch longer intervals. The authors maintain that most measurements of wind turbines upto now have not considered, or not adequately considered, these signals’ very complex andvarying behaviors at the time/bandwidth scalings of human perception. Although treatingwind turbine noise aspects at all relevant frequencies, this paper will concentrate on lowfrequencyinformation.