Average propagation velocity of modulated oscillations along a plane waveguide
Abstract
The problem of the multimode propagation of modulated oscillations in plane acoustic waveguides is analyzed using the Fourier integral method. The group velocity of the propagation of modulated oscillations is estimated using the method of weighted least squares with the weight function asquared, where a is the sound pressure modulus. As an example, calculations of the average group velocity are presented for a twolayer liquid.
 Publication:

Akusticheskii Zhurnal
 Pub Date:
 April 1986
 Bibcode:
 1986AkZh...32..258G
 Keywords:

 Acoustic Propagation;
 Oscillations;
 Propagation Velocity;
 Waveguides;
 Group Velocity;
 Least Squares Method;
 Planar Structures;
 Point Sources;
 Acoustics