Abstract: According to the present invention, a diaphragm is disposed on a yoke. A recess is formed in the upper surface of the diaphragm. A first metal plate is disposed in the recess. A permanent magnet is disposed on the approximate center of the first metal plate. A second metal plate is disposed on the permanent magnet. The sizes of the first metal plate and the second metal plate are greater than that of the permanent magnet. That is, with respect to the permanent magnet, the first metal plate and the second metal plate are disposed so as to protrude outward beyond the permanent magnet in the longitudinal direction.

Abstract: A speaker system is provided with: a plurality of boxes; a plurality of vibration output devices which output vibrations by using a vibrating body for converting an electric signal into vibrations; and a voice transmission unit which transmits voice information to the vibration output devices. The plurality of boxes have mutually different sizes, and comprise one box (n) in which other box (n+1) smaller by one size than the box (n) is accommodated successively, whereby all the boxes can be accommodated in the largest box. In the speaker system, when the boxes are arranged apart from each other, the vibration output devices can be installed in the respective boxes, thereby allowing the boxes to function as speakers. Thus, it is possible to emit voice from the respective boxes on the basis of voice information from the voice transmission unit.

Abstract: A hearing device is characterized by being provided with: a bone conduction drive that converts acoustic electric signals to vibrations; a housing that contains the bone conduction drive; a vibration output structure that is provided in the housing and that outputs the vibrations converted by the bone conduction drive; and an ear-hanging member provided to the housing, wherein one of a plurality of the vibration output structures which have different shapes is provided to the housing.

Abstract: A holder extends from a part fixed to a housing and curves in substantially S-shape. A portion that extends from the housing and significantly curves for the first time serves as an ear-hanging part. The ear-hanging part is a portion that is hanged on an upper part of an auricle of a user. A portion that curves from the ear-hanging part so as to protrude toward a transmitting surface serves as a holding part. That is, the holding part is a portion that is formed at a position opposed to the transmitting surface and that is closest to the transmitting surface. A grasping part that can be curved, as needed, so as to be slightly distanced away from the transmitting surface is provided further toward the end from the holding part. The grasping part is a portion at which the user grasps the holder, the grasping part being so held allowing for easy attachment to and detachment from the auricle.

Abstract: A hearing device is characterized by being provided with: a bone conduction drive that converts acoustic electric signals to vibrations; a housing that contains the bone conduction drive; a vibration output structure that is provided in the housing and that outputs the vibrations converted by the bone conduction drive; and an ear-hanging member provided to the housing, wherein one of a plurality of the vibration output structures which have different shapes is provided to the housing.

Abstract: The purpose of the present invention is to provide a hearing device using bone conduction which can be easily worn according to the physical features of respective wearers. The hearing device comprises a bone conduction speaker in which a bone conduction drive is included, and an ear hook part. The hearing device is characterized in that the relative position between the bone conduction speaker and the ear hook part can be changed.

Abstract: A holder extends from a part fixed to a housing and curves in substantially S-shape. A portion that extends from the housing and significantly curves for the first time serves as an ear-hanging part. The ear-hanging part is a portion that is hanged on an upper part of an auricle of a user. A portion that curves from the ear-hanging part so as to protrude toward a transmitting surface serves as a holding part. That is, the holding part is a portion that is formed at a position opposed to the transmitting surface and that is closest to the transmitting surface. A grasping part that can be curved, as needed, so as to be slightly distanced away from the transmitting surface is provided further toward the end from the holding part. The grasping part is a portion at which the user grasps the holder, the grasping part being so held allowing for easy attachment to and detachment from the auricle.