发明名称 IM-OHR-HOERGERAET MIT SCHALL-AUSGLEICHSKANAL
摘要 The invention relates to an intra-aural hearing aid for the deaf or hard of hearing with an earpiece which contains a microphone, an amplifier, an earphone, a battery compartment with battery and a balancing channel leading from the inside to the outside, closed off by a cover plate. The balancing channel (2, 2A) partially or completely surrounds at least a part of the sound outlet channel (4) from the earphone (5). This section (2A) is joined by another (2B) which continues past the earphone (5) towards the cover plate (3) and is at least partially an integral component of a unit (6) containing the earphone (5) and at the same time forms the transition between the two sections (2A, 2B) of the balancing channel.
申请公布号 DE3927797(A1) 申请公布日期 1991.02.28
申请号 DE19893927797 申请日期 1989.08.23
申请人 TOEPHOLM & WESTERMANN APS, VAERLOESE, DK 发明人 VERZICHT DES ERFINDERS AUF NENNUNG
分类号 G09B21/00;H04R25/00;H04R25/02 主分类号 G09B21/00
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