Accession Number:

ADD007761

Title:

Low-Frequency Directional Hydrophone.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1980-09-16

Pagination or Media Count:

9.0

Abstract:

A directional hydrophone and electronic circuit combination giving a cos sq theta directivity pattern. A monopole transducer is placed coaxially within a ring transducer and the ring output is fed to a function-conversion electronic circuit which provides a sin sq theta output signal. This signal and the output signal of the monopole are fed to a weighted differential amplifier where they are subtracted. The output of the amplifier is a cos sq theta signal. By utilizing different components in the function-conversion circuit, the device can be made narrowband or broadband. Author

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE