HEARING AID SYSTEM AND HEARING AID METHOD

摘要

A voice inputted in a microphone (11) is converted into an electrical signal and amplified by an amplifier (13). The amplified electrical signal is supplied to a primary coil (15) as an alternating current. Thus, the peripheral magnetic field of the primary coil (15) changes with time, so that an induced electromotive force develops in a secondary coil (17). A vibrating coil (21) is supplied with a current caused by the induced electromotive force, so that an induced magnetic field is produced around the vibrating coil (21). The vibrating coil (21) provided on an eardrum face is excited by the interaction of this induced magnetic field and a static magnetic field generated by a permanent magnet (19).