Sound Directivity Measurement at The WiValdi Research Wind Park

Abstract

Effective mitigation of wind turbine "swish" noise necessitates the development of designs for low-noise blade and noise mitigation blade add-ons. To complete the design cycle, a robust noise prediction tool needs to be developed and validated. Directivity measurements were undertaken at the WiValdi research wind park for the validation process. The present field measurement effectively captures the dynamics of sound directivities associated with amplitude modulation. Further investigation aimed at correcting outdoor sound propagation are ongoing, and comparative analysis with numerical noise prediction methods will be adressed in future work.