Pseudo-random noise generator calibration for acoustic hydrophon

Details Pseudo-random noise generator calibration for acoustic hydrophon Pseudo-random noise generator calibration for acoustic hydrophon

1983-04-01

1986-01-07

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Testing, monitoring, or calibrating

H04R 2900

Patent

active

045637563

ABSTRACT:
A pseudo-random noise generator (PRNG) or a hard clipped tonal is remotely mployed as an acoustic signal simulator for calibrating individual hydrophone channels of an acoustic array. The PRNG is employed to present a complete measurement of the channel gain and phase vs. frequency characteristics. The circuitry provides for synchronizing a channel hydrophone PRNG's to obtain gain and phase comparison of a single channel measurement. The hard clipped tonal provides the gain vs. frequency of the channel transfer function. In addition a binary signal is provided for changing the gain of the channel.

REFERENCES:
patent: 3700780 (1972-10-01), Roeschlein
patent: 3916533 (1975-11-01), Kijesky

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