FOUR CHANNEL HEADPHONE

An earphone for a four channel headphone has a filling material of light weight and good sound absorbing nature closely fitted inside a unit case. Two cylindrical or conical holes are provided in the filling material in the unit case. A sound generating element is provided at the bottom of each of t...

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Bibliographische Detailangaben
1. Verfasser:	YAMAZAKI H,JA
Format:	Patent
Sprache:	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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Beschreibung
Zusammenfassung:	An earphone for a four channel headphone has a filling material of light weight and good sound absorbing nature closely fitted inside a unit case. Two cylindrical or conical holes are provided in the filling material in the unit case. A sound generating element is provided at the bottom of each of the holes so that the sound generating element is directed toward the free open end of the unit case and a space is maintained in front of each of the sound generating elements. The free open end of each of the holes is closed by a lid made of a gas permeable material.