SIGNAL PICKUP WITH A VARIABLE DIRECTIVITY CHARACTERISTIC

摘要

A signal processor serves to generate a substitution signal (10) having a predetermined spatial directivity characteristic while using a first signal (8a) having a known spatial directivity characteristic and a second signal (8b) having a known spatial directivity characteristic. The first and second signals are converted to a spectral representation. In a signal processor, the spectral representations of the first and second signals are combined in accordance with a combination rule so as to obtain amplitude parameters of a spectral representation of the substitution signal having a predetermined directivity characteristic (10). In accordance with the combination rule, the absolute magnitudes of amplitude parameters of the spectral representations of the first and second signals are combined, so that the predetermined directivity characteristic differs from the directivity characteristics of the first (8a) and second (8b) signals.