Noise canceling microphone

Details Noise canceling microphone Noise canceling microphone

2007-07-24

2007-07-24

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Noise or distortion suppression

Using signal channel and noise channel

C381S071100, C381S094100, C704S200100

Reexamination Certificate

active

11170553

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.

REFERENCES:
patent: 4649505 (1987-03-01), Zinser et al.
patent: 5559839 (1996-09-01), Doelman
patent: 5796819 (1998-08-01), Romesburg
patent: 5815496 (1998-09-01), Flanagan et al.
patent: 6608897 (2003-08-01), Jin et al.

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