KERNEL TYPE EARPHONE HAVING PRESSURE EQUILIBRIUM STRUCTRE

The present invention relates to a kernel type earphone having a pressure equilibrium structure which can open and close a ventilation hole to improve a pressure difference if necessary. To this end, the kernel type earphone having a pressure equilibrium structure comprises a micro speaker, an earph...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	CHOI YOU LIM, CHOI CHEON KYU
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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