Antenna formed of a plurality of acoustic pick-ups

Details Antenna formed of a plurality of acoustic pick-ups Antenna formed of a plurality of acoustic pick-ups

1998-08-20

2000-12-12

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With beam steering, scanning, or focussing

367129, 381 92, H04R 312, H04R 5027

Patent

active

061607576

ABSTRACT:
The output signals of the acoustic sensors of the antenna are subjected to a processing of the superdirective kind, with a constraint as regards the modulus and a non-linear constraint which fixes the incoherent noise reduction.
The theoretical formulation of these constraints being as follows ##EQU1## the first constraint signifying that the total transfer function is a pure delay .tau., and the second constraint signifying that a limit is fixed for the incoherent noise reduction.
The antenna is provided to improve the near-field reception.

REFERENCES:
patent: 5715319 (1998-02-01), Chu

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