Method for in-situ measuring of acoustic attenuation and system therefor
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United States of America Patent
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Aug 18, 2009
Grant Date -
Jan 17, 2008
app pub date -
Jul 13, 2006
filing date -
Jul 13, 2006
priority date (Note) -
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Abstract
There is provided a method for measuring in-situ the acoustic attenuation obtained by a hearing protection device worn by a user, comprising: positioning the hearing protection device comprising a microphone oriented towards the user's ear canal at the user's ear;providing a test signal via the loudspeaker, capturing audio signals representative of the level of the test signal in the closed space by the microphone of the measuring device and capturing audio signals representative of the level of the test signal in the user's ear canal by the microphone of the hearing protection device; processing the audio signals captured by the microphone of the measuring device and the audio signals captured by the microphone of the hearing protection device and estimating the attenuation provided by the hearing protection device from the processed audio signals.
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