Hearing aid worn in ear or with otoplastic worn in ear generates second acoustic earpiece signal region of ventilation channel to inhibit acoustic signal entering closed ear canal volume from outside

摘要

The device has a second microphone (6) that acquires a second acoustic signal from a first region of a ventilation channel (5) and converts it into a second electrical microphone signal, which is fed to a filter device (7), which outputs an electrical signal to a second receiver (8), which outputs a second acoustic earpiece signal region of the ventilation channel to inhibit an acoustic signal entering a closed ear canal volume from the outside.