Apparatus for measuring flow noise of water over a hydrophone

Details Apparatus for measuring flow noise of water over a hydrophone Apparatus for measuring flow noise of water over a hydrophone

2007-10-16

2007-10-16

Lobo, Ian J. (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Signal transducers

C073S04050A

Reexamination Certificate

active

11512538

ABSTRACT:
A water flow noise measuring apparatus comprising: a frame; a beam comprising a distal and a proximal end, where the proximal end is pivotably coupled to the frame; a hydrophone capable of detecting water flow noise and generating water flow noise data, where the hydrophone is coupled to the beam at a predetermined distance from the proximal end; an angular displacement sensor capable of detecting the angular displacement of the beam with respect to the frame and generating a displacement detection signal, where the angular displacement sensor is operably coupled to the beam and the frame; and a computer capable of receiving the water flow noise data and the displacement detection signal, determining the tangential velocity of the hydrophone from the displacement detection signal, and generating an output signal representing the water flow noise data as a function of the tangential velocity.

REFERENCES:
patent: 5339287 (1994-08-01), Bauer
patent: 5477506 (1995-12-01), Allen
patent: 7248703 (2007-07-01), Heine et al.
patent: 2003/0110854 (2003-06-01), Nakada et al.
patent: 2003/0204338 (2003-10-01), Martinek

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