Accession Number:

AD1066840

Title:

A System and Method for the Calibration of a Hydrophone Line Array in a Quasi-Diffuse Ambient Sound Field

Descriptive Note:

Technical Report

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI NEWPORT United States

Personal Author(s):

Report Date:

2018-09-25

Pagination or Media Count:

58.0

Abstract:

A method is provided to measure a modulus of complex sensitivity of hydrophone data channels using a quasi-diffuse sound field. In the method, a radiation pattern representing shallow water sources directs to a location as a direct acoustic path and sound reflects to the location from the water bottom as a reflected acoustic path. At least one hydrophone receives the sounds at the location as acoustic signals with an acoustic intensity being the sound intensities along the acoustic paths.The sound intensity at the hydrophones also relates to a zenith angle and a bottom intensity reflection coefficient. The modulus of the frequency dependent sensitivity of the hydrophone is computed from measurements of the voltage output and voltages of reference hydrophones with the sound intensity as factor and with uncertainty reduced by averaging hydrophone sensitivities.

Subject Categories:

  • Acoustic Detection and Detectors
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE