5pAA12. Acoustic velocity related distributions.

Session: Friday Afternoon, December 6

Time: 5:05

Author: Matias H. W. Budhiantho
Location: Dept. of ECE, Univ. of Texas, Austin, TX 78712
Author: Elmer L. Hixson
Location: Dept. of ECE, Univ. of Texas, Austin, TX 78712


The acoustic velocity x, y, z components and its resultant amplitudes, the kinetic and total energy density distributions in a reverberation space, were measured using an energy density sensor consisting of four microphones. The space is a 225-m[sup 3] with average reverberation time of 6 s at 1 kHz. The room was excited with pure-tone, narrow- or wide-band noise. The result of the measurements showed that the acoustic velocity x, y, z component amplitudes were Gaussian-distributed, its resultant amplitude was Maxwell-distributed. The kinetic and total energy densities were gamma-distributed with three and four degrees of freedom, respectively. In agreement with published literature, the measurement also showed that acoustic pressure was Gaussian and the potential energy density was exponentially distributed, however, the other distributions have not been reported. Theoretical background and measured data will be presented.

ASA 132nd meeting - Hawaii, December 1996