Vehicle internal noise reduction system and the method thereof

Details Vehicle internal noise reduction system and the method thereof Vehicle internal noise reduction system and the method thereof

1994-12-19

1997-02-11

Kuntz, Curtis

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, 381 86, A61F 1106, H03B 2900

Patent

active

056029276

ABSTRACT:
A vehicle internal noise reduction system and the method thereof for reducing a noise sound by producing a canceling sound from a speaker based on a tap value formed and updated in an adaptive filter, the system and the method characterized in forming the tap value of the adaptive filter by convoluting a filter coefficient having a similar band pass characteristic to a frequency characteristic of the speaker into the tap value formed by the adaptive control of the adaptive filter for the purpose of operating the noise reduction system stably without causing distortion or divergence in the system.

REFERENCES:
patent: 5251262 (1993-10-01), Suzuki et al.
patent: 5426704 (1995-06-01), Tamamura et al.

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