Abstract: The object is to provide a talking device, which employs a bone conduction speaker. The device is small in size, light in weight and excellent in fittingness. Further, the device enables its users to communicate with each other without suffering from any difficulty in hearing even in a noisy environment. The device uses a bone conduction speaker, and may also have an ornamental function to serve as a pendant during non-use of the device. The device comprises a bone conduction speaker (5), an air conduction microphone (6) and a wireless circuit. The device is capable of: fitting to the user's body; and, connecting to a cell phone (8) by wireless through the wireless circuit. Both the bone conduction speaker (5) and the wireless circuit are packed in a head portion (2) of the ornamental pendant.

Abstract: An acoustic apparatus using a bone-conduction speaker can eliminate a sound pressure type speaker heretofore required and permit a bone-conduction speaker to serve both in communication and in outputting an incoming tone, thus reducing the apparatus in size and weight. The apparatus comprises: an outer casing (3), in which a bone-conduction speaker is incorporated; a unit case (1) mounted in the outer casing (3) through a support means (4); a drive means (5) for displacing the unit case (1) in the outer casing (3), the drive means (5) being disposed in the outer casing (3); an opening formed in the outer casing (3) in a manner such that the unit case (1) is permitted to have its side-head abutting surface (2) exposed to the outside, wherein the drive means (5) is so operated as to have the unit case (1) brought into or out of contact with the outer casing (3).