Hydrophone for determining direction of underwater sound

Details Hydrophone for determining direction of underwater sound Hydrophone for determining direction of underwater sound

1996-11-27

1997-12-09

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

367902, G01S 380

Patent

active

056967365

ABSTRACT:
The invention is directed to an improved acoustic sensor system for detering the direction of underwater sound signals relative to a user is disclosed. The sensor system includes first and second sensing means for sensing incoming acoustic energy and for providing first and second acoustic energy signals in response thereto; separation means for separating the first and second sensing means a distance S=E(C.sub.W /C.sub.A) where E is substantially equal to the separation distance between the users ears, C.sub.W is the speed of sound in water, and C.sub.A is the speed of sound in air; detector means, operatively connected with the first and second sensing means, for providing first and second output signals in response to the first and second acoustic energy signals; and audio means, operatively connected with the detector means, for providing an audio output to the user in response to the first and second output signals.

REFERENCES:
patent: 3174129 (1965-03-01), Laughlin et al.
patent: 3715577 (1973-02-01), Bohman
patent: 3986161 (1976-10-01), MacKellar
patent: 4363114 (1982-12-01), Bucaro et al.
patent: 5136555 (1992-08-01), Gardos
patent: 5140559 (1992-08-01), Fisher
patent: 5155707 (1992-10-01), Fisher
patent: 5570324 (1996-10-01), Geil

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