Omnidirectional transducer of elastic waves with a wide pass band and production process
US4782471A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Aug 21, 1985 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Aug 21, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H11/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Omnidirectional, wide pass band, elastic wave transducer comprising a rigid magnetostrictive diaphragm, each surface element of the diaphragm constituting a unidirectional elastic wave transducer in its normal direction, and an electric control means provided with two electric terminals for producing in the vicinity of the diaphragm a homogeneous magnetic field in keeping with an electric signal applied to the terminals of the control means or for supplying an electric signal in keeping with the variation of the magnetic field in the diaphragm as a function of an elastic wave received. The diaphragm is preferably a closed surface of revolution. Application in submarine transmission (hydrophone) and in high fidelity sound reproduction (loudspeaker, microphone) with a very wide pass band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.