Sealed cavity hydrophone array calibration

Details Sealed cavity hydrophone array calibration Sealed cavity hydrophone array calibration

1978-11-03

1980-05-27

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Testing, monitoring, or calibrating

H04R 2900

Patent

active

042053943

ABSTRACT:
Apparatus and method for calibrating a hydrophone array comprising a plurty of electrically interconnected hydrophones over a range of acoustic signal frequencies having a lower limit on the order of 1 Hz. Apparatus includes a container having a sealed cavity for sealing the hydrophone array in a selected fluid, an electro-acoustic projector for projecting acoustic signals of frequencies selected from the frequency range into the sealed cavity, and a reference hydrophone contained within the sealed cavity for generating a reference signal in response to each projected acoustic signal. Apparatus further includes monitoring equipment coupled to the reference hydrophone and to the hydrophone array for enabling a selected characteristic of one of the reference signals to be compared with the same characteristic of a signal generated by the hydrophone array when an acoustic signal is projected into the sealed cavity.

REFERENCES:
patent: 3859620 (1975-01-01), Percy
patent: 3864664 (1975-02-01), Trott et al.

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