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https://hdl.handle.net/2440/2848
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Type: | Journal article |
Title: | Expression for the estimation of time-averaged acoustic energy density using the two-microphone method (L) |
Author: | Ghan, J. Cazzolato, B. Snyder, S. |
Citation: | Journal of the Acoustical Society of America, 2003; 113(5):2404-2407 |
Publisher: | Amer Inst Physics |
Issue Date: | 2003 |
ISSN: | 0001-4966 1520-8524 |
Statement of Responsibility: | Justin Ghan, Ben S. Cazzolato, and Scott D. Snyder |
Abstract: | <jats:p>Acoustic energy density has been shown to exhibit lower spatial variance in reactive sound fields compared to the acoustic potential energy estimate offered by microphones, making it a very useful measure of the acoustic energy within an enclosure. Previously, frequency domain time-averaged energy density estimates have come about by estimating the pressure average and particle velocity between two closely spaced microphones using either analog or digital electronics. A frequency domain expression can be obtained by adding the weighted sum of the auto-spectral densities of both the pressure and particle velocity magnitude. The purpose of this letter is to derive an expression for the time-averaged acoustic energy density in the frequency domain using the auto- and cross-spectral densities between the two closely spaced microphones. The resulting expression is validated numerically.</jats:p> |
Description: | Copyright © 2003 Acoustical Society of America |
DOI: | 10.1121/1.1567273 |
Published version: | http://dx.doi.org/10.1121/1.1567273 |
Appears in Collections: | Aurora harvest 2 Environment Institute publications Mechanical Engineering publications |
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