Noise cancelling microphone

Details Noise cancelling microphone Noise cancelling microphone

2005-11-08

2005-11-08

Tran, Sinh (Department: 2644)

Electrical audio signal processing systems and devices

Noise or distortion suppression

Using signal channel and noise channel

C381S094100, C381S071100, C704S200100

Reexamination Certificate

active

06963649

ABSTRACT:
An improved noise canceling microphone is provided including robust design features and advanced noise control and speech discrimination convergence characteristics. Two adaptive controllers are used to ensure robust performance in quickly changing acoustic environments ensuring an acceptable minimum performance characteristic. Additionally, a new real-time spectral estimation procedure is applied to a noise canceling communications microphone platform that permits continued and optimal adaptation of non-voice bandwidth frequencies during speech transients.

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Gan, W. S. Parallel Implementation of the Frequency Bin Adaptive Filter For Acoustical Echo Cancellation. Sep. 1997, International Conference on Information, Communications and Signal Processing, IEEE (pp. 754-757).

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