Abstract
Sound intensity is a measure of the magnitude and direction of the flow of sound energy. Developments in sound intensity measurement capabilities in the last quarter century have occurred because of several reasons. The main ones include the derivation of the cross-spectral formulation for sound intensity and developments in digital signal processing. This paper begins with a brief historical introduction of sound intensity measurements. Then elementary theory for sound intensity is presented. A section on sound intensity measurements is then included. The next section of the paper discusses sources of measurement error; the major sources of error are described in some detail. The paper continues with a discussion of the main applications of sound intensity measurements: sound power determination, noise source identification, and transmission loss measurements. The paper concludes with a discussion of ISO and ANSI intensity related standards and relevant references.
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Translated from Akusticheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 49, No. 2, 2003, pp. 199–214.
Original English Text Copyright © 2003 by Crocker, Arenas.
This article was submitted by the authors in English.
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Crocker, M.J., Arenas, J.P. Fundamentals of the direct measurement of sound intensity and practical applications. Acoust. Phys. 49, 163–175 (2003). https://doi.org/10.1134/1.1560378
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DOI: https://doi.org/10.1134/1.1560378