Patent ID: 7062056

Claim:
Apparatus for testing a directional responding acoustic device, comprising: (a) at least first and second sound sources adapted to be placed in first and second positions respectively relative to said device, (b) at least one signal generator coupled to said first and second sound sources for generating a first audio signal applied to said first sound source and a second audio signal simultaneously applied to said second sound source, said first and second sound sources generating simultaneous first and second acoustical signals in response to said first and second audio signals applied thereto, (c) said first and second audio signals and hence said first and second acoustical signals each containing a plurality of orthogonal components, the components of said first audio signal being different from the components of said second audio signal, (d) and an analyzer adapted to be coupled to said device and synchronized with said generator, for analyzing the response of said device to said first and second acoustical signals.