| 摘要 |
PURPOSE:To attain a headphone through which a feeling of grave low frequency sound, i.e., the presence is obtained by providing a low frequency sound vibrator provided to a sound pressure generator at a prescribed relation of position and coupling mechanically the low frequency sound vibrator to the sound pressure generator. CONSTITUTION:The low frequency sound vibrator is coupled mechanically to the sound pressure generator. The low frequency sound vibrator consists of a magnetic circuit section being a driver unit comprising a voice coil 11 fixed to a case 10, a magnet 12, a yoke 13 and a yoke plate 14 and of a damper 15 supporting freely movably the said magnetic circuit section to the case 10. A sound pressure is generated from the sound pressure generator in response to a signal fed to the voice coil 5 from a signal line 17. Moreover, the magnetic circuit section including the magnet 12 is reciprocated in response to the low frequency sound electric signal fed to the voice coil 11 via a filter amplifier 18, a limiter 19 and an amplifier 20 so as to generate mechanical vibration. |
