Accession Number : ADD012200

Title :   Pseudo-Random Noise Generator Calibration for Acoustic Hydrophones.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Assard,Gerald L

Report Date : 07 Jan 1986

Pagination or Media Count : 5

Abstract : A pseudo-random noise generator (PRNG) of a hard clipped tonal is remotely employed 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 signal 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. (Patents)

Descriptors :   *PATENTS, *NOISE GENERATORS, *HYDROPHONES, *CALIBRATION, CIRCUITS, ACOUSTIC ARRAYS, PSEUDO RANDOM SYSTEMS, PSEUDO NOISE SYSTEMS, SIMULATORS, ACOUSTIC SIGNALS, FREQUENCY RESPONSE, PREAMPLIFIERS, ACOUSTIC CHANNELS, GAIN, PHASE, COMPARISON, TRANSFER FUNCTIONS, SHIFT REGISTERS

Subject Categories : Electrical and Electronic Equipment
      Test Facilities, Equipment and Methods
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE