Hearing aid i.e. In-the-ear-hearing aid, for use by hearing-impaired person, has shielding equipment arranged between speaker device and processing unit and partially made of amorphous, soft-magnetic metal with nano-crystalline structures

摘要

The aid has a signal processing unit processing signals from a signal receiving device i.e. microphone. A speaker device converts an output signal of the processing unit into output sound. A shielding equipment is arranged between the speaker device and the processing unit for reducing electromagnetic influence of the processing unit via the speaker device. The equipment is partially made of amorphous, soft-magnetic metal with nano-crystalline structures in preferred directions (24, 25). The equipment forms a housing (21) of the speaker device, where the housing is designed as a multi-layer.