The sound power produced by an acoustic source comprises its total sound energy radiated in all directions per unit time. As the global emission, it excites the reverberant field of a surrounding room. Conversely, an acoustic signal detected for audio applications, including driving reverberation effects, often results from a microphone at a discrete location that does not capture the global source sound and its sound-power spectrum. This paper explores several physical bases for how measured high-resolution spherical directivity functions and known room conditions allow audio engineers to optimize a microphone position to yield a signal with a mean-squared spectrum best approximating the time-averaged sound-power spectrum. The proposed approaches provide means to capture the global source sound with its attendant audio benefits, including the production of more realistic reverberation effects.

Authors: Bellows, Samuel D.; Leishman, Timothy W.
Affiliation: Acoustics Research Group, Department of Physics and Astronomy, Brigham Young University, Provo, UT
JAES Volume 71 Issue 1/2 pp. 20-33; January 2023
Publication Date: January 16, 2023 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=22028

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E-Library Location: (CD JAES71)   /jaes71/1/pg20.pdf

DOI: https://doi.org/10.17743/jaes.2022.0052

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