Noise-cancelling headphone

Details Noise-cancelling headphone Noise-cancelling headphone

2009-03-26

2011-10-25

Enad, Elvin G (Department: 2832)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

C381S071100, C381S072000, C381S074000

Reexamination Certificate

active

08045726

ABSTRACT:
A noise-cancelling headphone includes a cancel signal generator that receives ambient noise via an electro-acoustic transducer and generates and outputs a cancel signal eliminating the noise and a speaker unit that outputs an audio signal and a cancel signal, and connects the cancel signal generator to a first terminal of two input terminals of the speaker unit and connects a sound source of an audio signal to a second terminal thereof, whereby obtaining the noise-cancelling headphone with which one can enjoy music with high quality without the change in the sound quality and volume between when a noise-cancelling function is activated and when deactivated.

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