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

1994-12-16

1996-09-03

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, A61F 1106, H03B 2900

Patent

active

055531547

ABSTRACT:
Pulses synchronized with the period of the noise are generated and inputted to the adaptive filter. On the other hand, the tap number of the delay line of the adaptive filter is terminated at a tap number which is equal to the interval of the inputted pulse, whereby the number of times for calculation at the adaptive filter can be substantially reduced. Furthermore, in case where the tap number of the adaptive filter is changed according to the change of the period of the noise sound, the filter coefficient for cutting the high frequency domain is convoluted into the tap value of the adaptive filter, whereby noises caused by the change of the tap number can be eliminated even when the tap number of the adaptive filter is changed.

REFERENCES:
patent: 5251262 (1993-10-01), Suzuki et al.
patent: 5319715 (1994-06-01), Nagami et al.
patent: 5416844 (1995-05-01), Nakaji et al.
patent: 5426703 (1995-06-01), Hamabe et al.
patent: 5426704 (1995-06-01), Tamamura et al.

Affiliated with

Also associated with

Rating

Vehicle internal noise reduction system and the method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vehicle internal noise reduction system and the method thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vehicle internal noise reduction system and the method thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1957762