Electronic Instrumentation of a 10,000-psig Underwater Sound Transducer Calibration Facility for the 10- to 4000-Hz Frequency Range
Abstract
The electronic instrumentation of a new measuring facility for calibrating underwater sound transducers at controlled temperature from 3 to 45 deg C in the frequency range 10 to 4000 Hz at hydrostatic pressure to 10,000 psig is described. The pressure vessel consists of a vertically mounted 20.3-cm-i.d. stainless-steel tube 274.3 cm long. An active-impedance termination can be established at one or both ends of the tube to provide a plane, progressive wave within it. Three phase- and amplitude-adjustable outputs from the signal source activate the source transducer and those that control the terminal impedance. Multiple probe transducers and receiving channels serve to establish and monitor the required wave condition. Delay lines enable rapid and convenient adjustment to obtain minimum standing-wave ratio.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 15, 1969
- Accession Number
- AD0693096
Entities
People
- Lynn P. Browder
- Robert E. Ford
Organizations
- United States Naval Research Laboratory