Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
505701, 505705, 381203, 381204, 381205, 381188, 381192, 181167, H04R 700, H04R 1300, H04R 2302
An electroacoustic transducer comprises a terminal (1-1'), a voice coil (2) coupled to the terminal, and a diaphragm (4). The transducer further comprises an element (other than the voice coil) made of a superconducting material which cooperates with the voice coil (2) to provide electromechanical conversion of an electric signal appearing at the terminal (1-1') into vibrations of the diaphragm, or vice versa.
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"Keramische Supergeleiders"; De Ingenieur, No. 7/8; Jul./Aug. 1987; pp. 49-51.
Comberg Albert A.
Enz Ulrich E.
Hansen Norbert E. F.
LaRoche Eugene R.
Lee Benny T.
U.S. Philips Corporation
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