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Sound transmission device with selective filtering to be placed in the external ear canal and process of manufacturing thereof
Sound transmission device with selective filtering to be placed in the external ear canal and process of manufacturing thereof
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机译:放置在外耳道中的具有选择性过滤的传声装置及其制造方法
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摘要
A selective filtering sound transmission device comprising an end piece provided with a valve and a drilled hole and designed to fit into the external auditory canal, said end piece being formed by making a mould of the auditory canal and producing a countermould. Said hole (2) includes a tube (3) which opens into the space (7) left between the end piece (1) and the eardrum (4), the outer end of said tube being extended by an acoustic valve (8) which is partially or wholely inserted in a holder (6) housed in the end piece (1) and which defines at least one resonance cavity (8').
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