Characterization of sound emitted by wind machines used for frost control

Authors

  • Vince Gambino Aercoustics Engineering Ltd., 50 Ronson Drive, Toronto, Ont. M9W 1B3, Canada
  • Tony Gambino Aercoustics Engineering Ltd., 50 Ronson Drive, Toronto, Ont. M9W 1B3, Canada
  • Hugh W. Fraser Ontario Ministry of Agriculture, Food and Rural Affairs, Box 8000, Vineland, Ont. LOR 2E0

Keywords:

Aerodynamics, Buildings, Floors, Frost effects, Roofs, Frost control, Mechanical effects, Wind machines

Abstract

Characterization of sound emitted by wind machines used for frost control are studied. Noise from wind machines is due to both aerodynamic and mechanical effects, but aerodynamic sounds are considered to be the most significant. The orientation of the fan changes as the sound pressure level at a fixed point in the far field changes. The sound levels vary in a sinusoidal fashion, the period being of the order of a few minutes, level changes of up to 11 dBA have been measured. Low frequency and infrasonic energy from wind machines is capable of exciting components such as floors, walls roofs and windows that comprise a building structure, thus causing increased annoyance potential.

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Published

2007-09-01

How to Cite

1.
Gambino V, Gambino T, Fraser HW. Characterization of sound emitted by wind machines used for frost control. Canadian Acoustics [Internet]. 2007 Sep. 1 [cited 2021 Dec. 4];35(3):188-9. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1962

Issue

Section

Proceedings of the Acoustics Week in Canada