BONE CONDUCTION HEARING AID WITH AN AIR GAP ADJUSTMENT MECHANISM

BONE CONDUCTION HEARING AID WITH AN AIR GAP ADJUSTMENT MECHANISM

An electromagnetic vibrator for a bone conduction hearing aid is disclosed. The electromagnetic vibrator comprises a magnet arrangement comprising a central portion, a coil wound around the central portion and being configured to generate a dynamic magnetic field and at least one permanent magnet co...

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1. Verfasser: BERN, Bengt
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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creator BERN, Bengt
description An electromagnetic vibrator for a bone conduction hearing aid is disclosed. The electromagnetic vibrator comprises a magnet arrangement comprising a central portion, a coil wound around the central portion and being configured to generate a dynamic magnetic field and at least one permanent magnet configured to generate a static magnetic field. The electromagnetic vibrator further comprises a vibrator plate arranged in position and in such a manner that a gap, extending across a longitudinal axis of the electromagnetic vibrator is provided between the vibrator plate and at least one of said central portion or at least one permanent magnet. The electromagnetic vibrator further comprises an encasing surrounding at least a portion of the magnet arrangement. The magnet arrangement includes a bobbin assembly and encasing comprise a gap adjustment mechanism that is configured to move the bobbin assembly relative to the encasing for adjusting the gap between the vibrator plate and at least one of said central portion or at least one permanent magnet.
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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 BONE CONDUCTION HEARING AID WITH AN AIR GAP ADJUSTMENT MECHANISM
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