Accession Number:

AD0671191

Title:

A PORTABLE, GENERAL-PURPOSE UNDERWATER SOUND MEASURING SYSTEM.

Descriptive Note:

Research and development rept. Jan 65-Jul 66,

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER SAN DIEGO CALIF

Personal Author(s):

Report Date:

1967-12-01

Pagination or Media Count:

49.0

Abstract:

A portable underwater sound-pressure measuring system was developed and tested. The system was shown to be capable of measuring very low ambient-noise levels. High self-noise levels at frequencies less than 50 to 63 Hz are likely to be present if measurements are made from a drifting ship, and the cable is towed at drift velocity, probably because of a combination of flow noise and noise arising from cable vibrations. These high self-noise levels can be satisfactorily eliminated by using a slack cable system as described in the report. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE