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EP0303547A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Omnidirectional wide-band elastic wave transducer

Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1988-08-11
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Granted: —
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Expires: 2008-08-11
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Abstract

Abstract Translated from French Le transducteur comprend une membrane (34, 36) en matériau magnétostrictif munie de deux connexions électriques en deux points diamétralement opposés. La différence de potentiel entre ces connexions est proportionnelle à l'onde élastique, émise ou reçue, par ladite membrane. Un moyen de polarisation continue de la membrane magnétostrictive est en outre prévu. Il comprend une pièce (40, 42) à perméabilité magnétique élevée, ayant une forme sensiblement identique à celle de la membrane et placée au voisinage de ladite membrane, et un aimant permanent (38) disposé en contact avec ladite pièce. Applications à la transmission d'ondes élastiques de fréquence élevée dans l'eau (hydrophone) et à la reproduction sonore de haute fidélité dans l'air. The transducer comprises a membrane (34, 36) of magnetostrictive material provided with two electrical connections at two diametrically opposite points. The potential difference between these connections is proportional to the elastic wave, emitted or received, by said membrane. A means for continuous polarization of the magnetostrictive membrane is also provided. It comprises a part (40, 42) with high magnetic permeability, having a shape substantially identical to that of the membrane and placed in the vicinity of said membrane, and a permanent magnet (38) disposed in contact with said part. Applications to the transmission of high frequency elastic waves in water (hydrophone) and to high fidelity sound reproduction in air.

Inventors

  • 👤 Siegfried Klein

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 21:06
CPC Classifications
H; H04; H04R; H04R15/00; G; G01; G01H; G01H11/00; G01H11/02; G01H11/04

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US1653045A Cited
GB526641A Cited
US2233244A Cited
EP0063094A1 Cited
EP0075911A1 Cited
EP0177383A1 Cited

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