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Abbott J, Raspet R, Webster J. Wind fence enclosures for infrasonic wind noise reduction. J Acoust Soc Am. 2015;137(3):1265-73doi: 10.1121/1.4908568.
Abbott, J., Raspet, R., & Webster, J. (2015). Wind fence enclosures for infrasonic wind noise reduction. The Journal of the Acoustical Society of America, 137(3), 1265-73. https://doi.org/10.1121/1.4908568
Abbott, JohnPaul, et al. "Wind fence enclosures for infrasonic wind noise reduction." The Journal of the Acoustical Society of America vol. 137,3 (2015): 1265-73. doi: https://doi.org/10.1121/1.4908568
Abbott J, Raspet R, Webster J. Wind fence enclosures for infrasonic wind noise reduction. J Acoust Soc Am. 2015 Mar;137(3):1265-73. doi: 10.1121/1.4908568. PMID: 25786940.
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J Acoust Soc Am. 2015 Mar;137(3):1265-73. doi: 10.1121/1.4908568.

Wind fence enclosures for infrasonic wind noise reduction.

The Journal of the Acoustical Society of America

JohnPaul Abbott, Richard Raspet, Jeremy Webster

Affiliations

  1. Department of Physics and Astronomy and National Center for Physical Acoustics, University of Mississippi, P.O. Box 1848, 1 Chucky Mullins Drive, University, Mississippi 38677.

PMID: 25786940 DOI: 10.1121/1.4908568

Abstract

A large porous wind fence enclosure has been built and tested to optimize wind noise reduction at infrasonic frequencies between 0.01 and 10 Hz to develop a technology that is simple and cost effective and improves upon the limitations of spatial filter arrays for detecting nuclear explosions, wind turbine infrasound, and other sources of infrasound. Wind noise is reduced by minimizing the sum of the wind noise generated by the turbulence and velocity gradients inside the fence and by the area-averaging the decorrelated pressure fluctuations generated at the surface of the fence. The effects of varying the enclosure porosity, top condition, bottom gap, height, and diameter and adding a secondary windscreen were investigated. The wind fence enclosure achieved best reductions when the surface porosity was between 40% and 55% and was supplemented by a secondary windscreen. The most effective wind fence enclosure tested in this study achieved wind noise reductions of 20-27 dB over the 2-4 Hz frequency band, a minimum of 5 dB noise reduction for frequencies from 0.1 to 20 Hz, constant 3-6 dB noise reduction for frequencies with turbulence wavelengths larger than the fence, and sufficient wind noise reduction at high wind speeds (3-6 m/s) to detect microbaroms.

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