Electrical audio signal processing systems and devices – Headphone circuits
Reexamination Certificate
2006-07-04
2006-07-04
Le, Huyen (Department: 2644)
Electrical audio signal processing systems and devices
Headphone circuits
C381S328000, C381S071100, C370S276000
Reexamination Certificate
active
07072476
ABSTRACT:
A headset includes two earpieces. One earpiece acts as a microphone, and the other earpiece acts as an earphone. Isolated from background noise and vibrations due to bone conduction, the microphone earpieces convert voice sounds from the air column in the external ear canal into electrical signals. Other embodiments of the invention address feedback problems and achieve improved performance relative to existing full duplex communication devices. In another embodiment of the invention a headset includes a band having opposite ends that extend in a forward direction from the two earpieces. The band then either extends downwardly or backwards.
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Masuda Masahisa
White Donald R.
Le Huyen
Marger & Johnson & McCollom, P.C.
Matech, Inc.
Tran Con P.
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