Low-frequency sonar countermeasure
US6873572B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 2004 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | May 3, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/537
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 battery/electronics 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.