3-in-1 anti-noise radio sound-collection device

Details 3-in-1 anti-noise radio sound-collection device 3-in-1 anti-noise radio sound-collection device

2006-01-31

2006-01-31

Grier, Laura A. (Department: 2644)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

C381S074000, C381S311000

Reexamination Certificate

active

06993140

ABSTRACT:
A headphone mounted 3-in-1 anti-noise radio sound-collection device is described. The device includes an anti-noise circuit system, a radio am/fm circuit system, and a sound collection system for receiving an external sound. The structure is wireless with a microphone and associated cables contained in the headphone headband. The microphone is provided to receive an external noise signal, and the device then generates a nullifying out of phase signal. The device uses a sound collection device to receive an external signal and an am/fm radio is also provided, all of which sound through the ear speakers on the headphone.

REFERENCES:
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patent: 5604813 (1997-02-01), Evans et al.
patent: 5647011 (1997-07-01), Garvis
patent: 5666658 (1997-09-01), Borchardt et al.
patent: 5887066 (1999-03-01), Nakagawa
patent: 6035047 (2000-03-01), Lewis
patent: 6061456 (2000-05-01), Andrea et al.
patent: 2001/0050993 (2001-12-01), Douglas

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