Decay of Spherical Sound Pulses Due to Viscosity and Heat Conduction
- 1 January 1954
- journal article
- research article
- Published by Acoustical Society of America (ASA) in The Journal of the Acoustical Society of America
- Vol. 26 (1) , 58
- https://doi.org/10.1121/1.1907289
Abstract
By combining the results of Kirchhoff and Knudsen, the effect of viscosity and heat conduction on a spherical sound pulse are found. A rectangular pulse becomes Gaussian, its peak moves with sound speed, its width increases proportionally to √t, and its amplitude decreases proportionally to x−1, where x denotes radial distance from the origin. This behavior is exactly the same as that of a pulse in one dimension, except for an extra factor of 1/x which accounts for the spherical spreading.Keywords
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