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Active noise suppression for a hearing aid device which can be worn in the ear or a hearing aid device with otoplastic which can be worn in the ear
Active noise suppression for a hearing aid device which can be worn in the ear or a hearing aid device with otoplastic which can be worn in the ear
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机译:用于可佩戴在耳朵中的助听器或可佩戴在耳朵中的具有耳塑料的助听器的有源噪声抑制
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摘要
In the case of a hearing aid device which can be worn in the ear or a hearing aid device with a otoplastic which can be worn in the ear, the penetration of direct sound through a ventilation channel of the hearing aid device or of the otoplastic is prevented. An acoustic signal is picked up from the ventilation channel via a second microphone in a first region of the ventilation channel and phase-shifting it in a filter device in such a way that the direct sound is at least largely eliminated after the phase-shifted signal is emitted into the ventilation channel via a second earphone. The invention offers the advantage that an enlargement of the cross section of the ventilation channel is made possible as a result, even to provide an open supply, without disturbing direct sound getting into the auditory canal of the person wearing the hearing device.
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