Audio headphone provided with device to prevent audio feedback

Details Audio headphone provided with device to prevent audio feedback Audio headphone provided with device to prevent audio feedback

2008-07-15

2011-10-25

Nguyen, Tuyen (Department: 2832)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

Reexamination Certificate

active

08045742

ABSTRACT:
An ear muff used with a headset containing two ear muffs. Both of the ear muffs are provided with a loudspeaker and a microphone for sensing ambient noise. An active noise reduction (ANR) circuitry is utilized to cancel the ambient noise. An immobile or inflexible disc is provided within each ear muff for preventing the change of dimensions of an enclosure which includes the loudspeaker and microphone, thereby preventing audio feedback.

REFERENCES:
patent: 5182774 (1993-01-01), Bourk
patent: 6829365 (2004-12-01), Kim
patent: 2007/0154049 (2007-07-01), Levitsky et al.
patent: 2010/0105447 (2010-04-01), Sibbald et al.

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