发明名称 |
EARPHONE WITHOUT IMPULSE NOISE FOR PROTECTION AGAINST CONDUCTIVE HEARING LOSS |
摘要 |
An earphone without impulse noise for protection against conductive hearing loss includes an earphone housing (40) and a loudspeaker (50) mounted in a sound chamber (43) therein. A front end of the earphone housing has an earplug (41) adapted to be hanged between the tragus and the antitragus of the external ear while a rear end thereof has a hood (42) with a hollow sound chamber (43). A loudspeaker is supported in the hollow sound chamber of the hood around which a plurality of sound holes (44) are distributed, wherein a sound output end of the loudspeaker must be positioned facing to the hood and opposite to the earplug. A conductive cord (60) is connected at the bottom end of the earphone housing for transmitting electric current to the loudspeaker.
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申请公布号 |
CA2320214(A1) |
申请公布日期 |
1999.08.19 |
申请号 |
CA19992320214 |
申请日期 |
1999.02.05 |
申请人 |
LIN, CHUNG-YU;JOHNNY'S PHONE CO. |
发明人 |
LIN, CHUNG-YU |
分类号 |
H04R1/10;H04R25/00;(IPC1-7):H04R25/00 |
主分类号 |
H04R1/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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