BONE CONDUCTION SPEAKER UNIT

To provide a bone conduction speaker unit with which the possibility of adsorption of fine iron powder and dirt and dust, entrance of moisture, or the like, has been eliminated, and further the level of the sound leakage from the bone conduction speaker unit as a single element is satisfactorily low...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	FUKUDA, Mikio
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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Beschreibung
Zusammenfassung:	To provide a bone conduction speaker unit with which the possibility of adsorption of fine iron powder and dirt and dust, entrance of moisture, or the like, has been eliminated, and further the level of the sound leakage from the bone conduction speaker unit as a single element is satisfactorily low over a frequency range that is crucial for good sound transmission using a bone conduction speaker. The bone conduction speaker unit is of magnetic type, having a bone conduction speaker 2 being housed in a unit casing 1 the top of which is opened, with a contact plate 4 for vibration transmission being disposed above a diaphragm 3 of the bone conduction speaker 2, the top opening of the unit casing 1 being blocked with an elastic membrane 5 that is breathable.