The effect of microphone wind noise on the amplitude modulation of wind turbine noise and its mitigation

Kendrick, P; von Hünerbein, S; Cox, TJ

Abstract

Microphone wind noise can corrupt outdoor recordings even when wind shields are used. When monitoring wind turbine noise, microphone wind noise is almost inevitable because measurements cannot be made in still conditions. The effect of microphone wind noise on two Amplitude Modulation (AM) metrics is quantified in a simulation, showing that even at low wind speeds of 2.5 m/s errors of over 4 dBA can result. As microphone wind noise is intermittent, a wind noise detection algorithm is used to automatically find uncorrupted sections of the recording, and so recover the true AM metrics to within ±2/±0.5 dBA.

• Journal Article Type: Article
• Acceptance Date: Jun 14, 2016
• Online Publication Date: Jul 12, 2016
• Publication Date: Jul 12, 2016
• Deposit Date: Jun 30, 2016
• Publicly Available Date: Jan 12, 2017
• Journal: The Journal of the Acoustical Society of America (JASA)
• Print ISSN: 0001-4966
• Electronic ISSN: 1520-8524
• Volume: 140
• Issue: 1
• Pages: EL79
• DOI: https://doi.org/10.1121/1.4955010
• Publisher URL: http://dx.doi.org/10.1121/1.4955010
• Related Public URLs: http://scitation.aip.org/content/asa/journal/jasa
• Additional Information: Funders : Engineering and Physical Sciences Research Council (EPSRC); Projects : Good Recording project; Grant Number: EPSRC–EP/J013013/1