Gated photon correlation spectroscopy for acoustical particle velocity measurements in free-field conditions

The measurement of acoustic pressure at a point in space using optical methods has been the subject of extensive research in airborne acoustics over the last four decades. The main driver is to reliably establish the acoustic pascal, thus allowing the calibration of microphones with standard and non...

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Bibliographic Details
Published inThe Journal of the Acoustical Society of America Vol. 133; no. 3; pp. EL156 - EL161
Main Authors Koukoulas, Triantafillos, Piper, Ben, Theobald, Pete
Format Journal Article
LanguageEnglish
Published United States 01.03.2013
Subjects
Acoustics - instrumentation
Equipment Design
Lasers, Solid-State
Models, Theoretical
Motion
Optics and Photonics - instrumentation
Pressure
Signal Processing, Computer-Assisted
Sound
Spectrum Analysis
Time Factors
Transducers
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ISSN0001-4966
1520-8524
1520-8524
DOI10.1121/1.4789006

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Summary:The measurement of acoustic pressure at a point in space using optical methods has been the subject of extensive research in airborne acoustics over the last four decades. The main driver is to reliably establish the acoustic pascal, thus allowing the calibration of microphones with standard and non-standard dimensions to be realized in an absolute and direct manner. However, the research work so far has mostly been limited to standing wave tubes. This Letter reports on the development of an optical system capable of measuring acoustic particle velocities in free-field conditions; agreement within less than 0.6 dB was obtained with standard microphone measurements during these initial experiments.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0001-4966
1520-8524
1520-8524
DOI:10.1121/1.4789006