High-Reliability Hydrophone Design, USRD Type H68B
Abstract
The Underwater Sound Reference Detachment of the Naval Research Laboratory has developed a state-of-the-art, deep-submergence hydrophone for use in the Underwater Tracking Range of the Atlantic Fleet Weapons Training Facility, St. Croix, that combines the best materials and craftsmanship to provide an expected service life of 20 years. The sensor provides a nominal open-circuit crystal sensitivity of -180 dB re 1 V/microPascals, smooth response to frequencies above 40 kHz, omnidirectionality in the horizontal (XY) plane, and a hemispherical pattern in the vertical (XZ) plane at higher frequencies. The hydrophone has two independent preamplifiers remotely operable by a unique switching circuit. All functions-preamplifier power, signal output, and preamplifier switching-are accomplished over a coaxial cable. Established- reliability, military-specification components are used for the electronics. Specific materials used for the hydrophone and the rationale for their inclusion in the design are given.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 10, 1981
- Accession Number
- ADA104411
Entities
People
- A. C. Tims
- C. K. Brown
Organizations
- United States Naval Research Laboratory