System and method of noise detection

Details System and method of noise detection System and method of noise detection

1997-08-18

1998-11-03

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

367129, G01S 380

Patent

active

058319360

ABSTRACT:
A noise detection system is provided which includes a receiving unit, a processing unit and a user interface unit connected together. The receiving unit consists of a three-dimensional acoustical array for generally simultaneously receiving a multiplicity of sound signals from different directions. The sound signals have at least one sound source of interest. The processing unit processes the sound signals and consists of a three-dimensional spatial filter for identifying the elevation and azimuth of each of the sound signals, a sound database containing a multiplicity of soundprints of sound sources of interest, apparatus for classifying the sound signals with the soundprints, and apparatus for providing the azimuth and elevation of each of the classified sound signals. The user interface unit indicates to the user the azimuths and elevations of the classified sound signals. The processing unit further consists of filtering apparatus for filtering extraneous noise signals received by the acoustical array.

REFERENCES:
patent: 4333170 (1982-06-01), Mathews et al.
patent: 4916453 (1990-04-01), Costas
patent: 5339281 (1994-08-01), Narendra et al.
patent: 5495427 (1996-02-01), Puma et al.
patent: 5504717 (1996-04-01), Sharkey et al.

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