|発明の名称||SYSTEM AND METHOD FOR HEARING AID|
PROBLEM TO BE SOLVED: To provide a system and method for a hearing aid, capable of realizing an accurate sound pressure amplification characteristic even in a range of high sound frequencies without the need for the system to be intruded into a human body.
SOLUTION: Voice picked up by a microphone 11 is transduced into an electric signal and amplified by an amplifier 13. The amplified electric signal is fed to a primary coil 15 as an AC current. When the AC current flows through a primary coil 15, the magnetic field around the primary coil 15 is temporally changed and an induced electromotive force is generated in a secondary coil 17. A current by the induced electromotive force is supplied to a vibration coil 21 electrically connected to the secondary coil 17. When the current by the induced electromotive force is supplied to the vibration coil 21, an induced magnetic field caused by the induced electromotive force is generated around the vibration coil 21. The interaction between the induced magnetic field and a static magnetic field formed by a permanent magnet 19 excites the vibration coil 21 provided to a tympanic face.
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