An analysis of the acoustic power radiated by a point dipole source into a rectangular reverberation chamber

Abstract

The acoustic power radiated by a point dipole source into a rectangular reverberation chamber has been calculated by consideration of the total power absorbed by the chamber surfaces. A normal mode approach has been used. The time and space averaged value of the radiated acoustic power is found to approximate closely to the free field value. An expression ion normalized standard deviation of the acoustic power radiated has been obtained as a function of source frequency, chamber volume, chamber reverberation time and dipole orientation. The radiated power has also been computed for a dipole source near one or more surfaces within the chamber and for different dipole orientations. The results make a contribution to development of the standard techniques for determination of sound power radiated by a source in reverberation chambers and complement the substantial amount of corresponding work on monopole sound sources.