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The Measurement of Sound Fields Using Laser Doppler Anemometry

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Methods of analysis for the study of sound fields are outlined and their fundemental limitations discussed. The spectral analysis and the correlation analysis method are shown to have the same limitations in the analysis of sound fields, since they are time averaged methods of analysis. This limits the use of these techniques to simple situations such as a monotonic sound field. The frequency tracking method, although it is dependent on heavy seeding, is shown by the use of a theoretical model, to allow the measurement of the acoustic particle velocity and the frequency of the sound field components for more complex situations. The possibility of obtaining the phase difference between the components is also discussed.
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Document Type: Research Article

Publication date: May 1, 1999

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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