Hearing aid system and hearing aid method

摘要

Sound input to a microphone is converted into an electrical signal and the electrical signal is amplified by an amplifier. The amplified electrical signal is supplied to a primary coil as an alternating current. Thus, a magnetic field around the primary coil varies with time and a secondary coil generates an induced electromotive force. A vibrating coil is supplied with current generated by the induced electromotive force and thus an induced magnetic field is generated around the vibrating coil. The vibrating coil provided on the surface of an eardrum is vibrated by interaction between the induced magnetic field and a magnetostatic field generated by a permanent magnet.