Far field acoustic radiation reduction

Details Far field acoustic radiation reduction Far field acoustic radiation reduction

1993-09-30

1995-01-10

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Sonar counter-measures

367901, H04B 1500

Patent

active

053813812

ABSTRACT:
A system and method are provided to reduce a structure's far field acoustic adiation signature. A plurality of acoustic sensors are positioned in the acoustic near field of the structure for measuring the near field acoustic radiation of the structure. A programmable controller generates a prediction of the structure's far field acoustic radiation signature using the near field acoustic radiation. The prediction is then used to generate a noise control signal applied to a plurality of acoustic radiators suspended within the structure. The radiators convert substantially all of the noise control signal to airborne acoustic energy within the structure.

REFERENCES:
patent: 3740707 (1973-06-01), O'Brien et al.
patent: 4025724 (1977-05-01), Davidson, Jr. et al.
patent: 5247486 (1993-09-01), Regnault

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