Acoustic measurement device in an air flow
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United States of America Patent
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Jan 31, 2017
Grant Date -
Aug 27, 2015
app pub date -
Jan 23, 2015
filing date -
Feb 18, 2014
priority date (Note) -
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Abstract
An acoustic measurement device in an air flow and subjected to a noise source, the device including: a base having a surface in contact with the air flow, a first microphone which is mounted flush with the surface, a second and a third microphone which are mounted on either side of the first microphone, each, at the bottom of a cavity opening onto the surface, and where each of the second and third microphones is covered with a noise-reducing element, the second and the third microphones being assembled at a distance from the first microphone that is greater than the correlation length of the turbulent phenomenon in the frequency band studied, and a computer or processor provided for computing the power spectrum of the noise source from the signals detected by the three microphones.
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