Paraholography—a new method for measurement of the directional distribution of sound waves in a reverberation chamber

Abstract

We describe a method for experimental determination of the complex of plane waves composing the sound field in a reverberation chamber. The basic holographic principle is comparison of the actual sound field with a family of reference plane waves having precisely known directions of propagation, sound pressures, and phases. The reference waves are not “real” waves but are created electronically, on the electrical side of microphones sensing the actual sound field, so as to be “parallel” to real waves.