Patent ID: 6920227

Claim:
A hearing aid device that can be worn in the ear or a hearing aid device with otoplastic that can be worn in the ear, comprising: a first microphone for picking up a first acoustic signal and emitting a first electrical microphone signal; a first earphone for emitting a first earphone signal; a signal processing unit connected to the first microphone and the first earphone; a filter connected to the signal processing unit; a ventilation channel configured for ventilating a volume of an auditory canal that is enclosed by the hearing aid device when it is being worn or by the otoplastic when it is being worn, the ventilation channel having a first region and a second region, the second region being located closer to the enclosed volume of the auditory canal than the first region; a second earphone configured to emit a second acoustic earphone signal into the second region; and a second microphone configured for picking up a second acoustic signal from the first region of the ventilation channel and converting it into a second electrical microphone signal, the second electrical microphone signal being fed to the filter, the filter emitting an electrical signal to the second earphone, and the second acoustic earphone signal at least largely suppressing an acoustic signal penetrating through the ventilation channel from outside into the enclosed volume of the auditory canal.