Sound production device and earphone

The utility model discloses a sound production device and an earphone. The sound production device comprises a front cover, a sound production single body and a rear cover. Wherein the front cover isprovided with a cavity, the rear cover covers the front cover and encapsulates the cavity, the soundi...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG XIAOQIANG, LIN SHAOJIA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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