Article
Article
Sound intensity
Article By:
Tichy, Jiri Graduate Program in Acoustics, Pennsylvania State University, State College, Pennsylvania.
Last reviewed:January 2020
DOI:https://doi.org/10.1036/1097-8542.637400
A fundamental acoustic quantity which describes the rate of flow of acoustic energy through a unit of area perpendicular to the flow direction. The unit of sound intensity is watt per square meter. The intensity is calculated at a field point (x) as a product of acoustic pressure p and particle velocity u. Generally, both p and u are functions of time, and therefore an instantaneous intensity vector is defined by Eq. (1).
(1)The content above is only an excerpt.
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