Headphoning

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers

Reexamination Certificate

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Details

C381S370000, C381S074000

Reexamination Certificate

active

07412070

ABSTRACT:
A noise reducing headset has one or more of the following features: (a) pair of earcups each seated in a yoke assembly mechanically coupled by a headband enclosing a flat spring formed with a slot that runs the length of the spring accommodating electrical wires electrically interconnecting electrical elements in the earcups, (b) each earcup having active noise reducing circuitry, (c) each earcup including a loudspeaker driver located off center in the earcup to allow an internal cavity inside each earcup to accommodate a loudspeaker driver, a microphone and an electronic printed circuit board and one of a battery and plug assembly, (d) one of the earcups accommodating a detachably secured plug assembly having a sensitivity switch covered by the earcup when the plug assembly is fully seated in the earcup, (e) the other earcup having a battery door that may be opened to allow insertion and removal of the battery and covered by a yoke assembly when the headset is worn by a user with the battery fully seated in the earcup.

REFERENCES:
patent: 3902120 (1975-08-01), Dascal et al.
patent: 4455675 (1984-06-01), Bose et al.
patent: 4499593 (1985-02-01), Antle et al.
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patent: 5675658 (1997-10-01), Brittain et al.
patent: 6236732 (2001-05-01), Griffith
patent: 6597792 (2003-07-01), Sapiejewski et al.
patent: 7215766 (2007-05-01), Wurtz
patent: 0895439 (1999-02-01), None
patent: WO 02/080504 (2002-10-01), None
EP Search Report in corresponding Application No. 05100954.6 dated Oct. 17, 2006.

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