Structure for earphones with multiple sound tracks

Details Structure for earphones with multiple sound tracks Structure for earphones with multiple sound tracks

2005-05-12

2008-10-14

Ensey, Brian (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

C381S371000, C381S373000

Reexamination Certificate

active

07436973

ABSTRACT:
A structure for earphones with multiple sound tracks, includes an earphone casing, at least one first speaker, a second speaker and an adjusting member. The earphone casing has a plurality of outer-sound holes on the outside portion thereof. The speakers are disposed in the earphone casing. The speakers face outwards. The adjusting member is disposed on the earphone casing. The adjusting member has a plurality of adjusting holes corresponding to the outer sound holes of the earphone casing so that the adjusting holes of the adjusting member and the outer sound holes of the earphone casing can be aligned or staggered to reduce the sound pressure and reduce the discomfort for a user, thereby reducing hearing damage and loss. Furthermore the device has the functions of earphones, a loud speaker, a sound box and an earphone device with multiple sound tracks.

REFERENCES:
patent: 4005278 (1977-01-01), Gorike
patent: 2002/0090101 (2002-07-01), Ma
patent: 2005/0105755 (2005-05-01), Yueh

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