System for selective sound capture for reverberant and noisy env

Details System for selective sound capture for reverberant and noisy env System for selective sound capture for reverberant and noisy env

1995-07-14

1997-11-04

Kuntz, Curtis

Electrical audio signal processing systems and devices

Directive circuits for microphones

381188, 367124, H04R 300

Patent

active

056848820

ABSTRACT:
A system for selective sound capture for hands-free telephony and multimedia workstations of the acoustic antenna type with an aerial formed by a member with a concave cylindrical surface. The system includes a plurality of electro-acoustic transducers which are distributed over and in the vicinity of the cylindrical surface. Circuits for partial summation of a plurality of analog sound signals make it possible to form elementary acoustic antennas and a summation circuit produces a resultant analog signal representative of the sound signal arising from a useful speaking area.

REFERENCES:
patent: 4310730 (1982-01-01), Aaroe
patent: 4653102 (1987-03-01), Hansen
patent: 4703506 (1987-10-01), Sakamoto et al.
patent: 4723294 (1988-02-01), Taguchi
A Microphone Array for Multimedia Workstations, by Mahieux et al, 3rd International Workshop on Acoustics Echo Control, 7&* Sep. 1993.

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