Accession Number : ADD007382

Title :   Sealed Cavity Hydrophone Array Calibration.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Pickens,George O

Report Date : 27 May 1980

Pagination or Media Count : 9

Abstract : Apparatus and method for calibrating a hydrophone array comprising a plurality 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 hydorphone 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. (Author)

Descriptors :   *Patents, *Acoustic arrays, Calibration, Hydrophones, Seals(Stoppers)

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE