Accession Number:

ADD020187

Title:

Low Frequency Sonar Countermeasure

Descriptive Note:

Patent application, Filed 3 May 2004

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

2004-05-03

Pagination or Media Count:

17.0

Abstract:

A multi-port projector of acoustic energy in water includes a cylindrical hollow transducer having open annular ends. A thin, flexible member is secured to each annular end to extend across each opening to be displaced by the transducer, and the transducer and flexible members form an interior sealed from ambient water. A batteryelectronics module is in the interior and is spaced from the transducer and flexible members to couple driving signals to the transducer for reciprocally displacing it and the flexible members in response to the driving signals. An inert liquid fills the interior around the module, and an open truss on each annular end exposes the flexible members to the ambient water. Cylindrical portions coaxially extending with the transducer on a common longitudinal axis are connected to the open trusses for projecting acoustic energy of lower frequency than conventional cylindrical transducers of similar size.

Subject Categories:

  • Electrical and Electronic Equipment
  • Acoustic Countermeasures

Distribution Statement:

APPROVED FOR PUBLIC RELEASE