Phased-array sound pickup apparatus having no unwanted response

Details Phased-array sound pickup apparatus having no unwanted response Phased-array sound pickup apparatus having no unwanted response

1983-08-31

1985-06-04

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Directive circuits for microphones

H04M 120

Patent

active

045219087

ABSTRACT:
In a phased-array sound pickup apparatus microphones are divided into a first and second subarrays, the microphones of the first subarray having individual unidirectional response patterns oriented on one side of the normal to the array and the microphones of the second subarray having their response patterns oriented on the other side of the normal so that the array's main lobe assumes different orientation from the orientation of the microphone's individual response patterns so that the array's unwanted back lobe falls outside of the microphone's response patterns. The microphones may be grouped into a plurality of pairs and the signals from the paired microphones are mixed so that different individual response patterns are generated in correlation with the array's main front lobe to cause the unwanted back lobe to occur outside of the individual response patterns.

REFERENCES:
patent: 4072821 (1978-02-01), Bauer
patent: 4308425 (1981-12-01), Momose
patent: 4485484 (1984-11-01), Flanagan

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