SYSTEM FOR SOUND PICK-UP, APPARATUS FOR SOUND PICK-UP AND REPRODUCTION

SYSTEM FOR SOUND PICK-UP, APPARATUS FOR SOUND PICK-UP AND REPRODUCTION

PCT No. PCT/FR92/00919 Sec. 371 Date Apr. 1, 1994 Sec. 102(e) Date Apr. 1, 1994 PCT Filed Oct. 2, 1992 PCT Pub. No. WO93/07730 PCT Pub. Date Apr. 15, 1993.Several microphones (M1, M3) are arranged substantially in the same plane (P) and are distributed symmetrically with respect to a direction of sy...

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1. Verfasser: ZURCHER, FREDERIC
Format: Patent
Sprache:eng ; fre ; ger
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DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
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description PCT No. PCT/FR92/00919 Sec. 371 Date Apr. 1, 1994 Sec. 102(e) Date Apr. 1, 1994 PCT Filed Oct. 2, 1992 PCT Pub. No. WO93/07730 PCT Pub. Date Apr. 15, 1993.Several microphones (M1, M3) are arranged substantially in the same plane (P) and are distributed symmetrically with respect to a direction of symmetry (D) perpendicular to this plane (P). A phase shift is applied between the signals output respectively by different microphones (M1, M3) and the signals thus phase shifted are added, in such a way as substantially to cancel the signals relating to any sound wave arriving in phase and with the same intensity on each of the microphones (M1, M3).
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subjects DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
title SYSTEM FOR SOUND PICK-UP, APPARATUS FOR SOUND PICK-UP AND REPRODUCTION
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