Method and apparatus for dynamic sound optimization

Details Method and apparatus for dynamic sound optimization Method and apparatus for dynamic sound optimization

1995-06-06

1997-03-25

Isen, Forester W.

Electrical audio signal processing systems and devices

Monitoring of sound

Amplification control responsive to ambient sound

381108, H03G 324

Patent

active

056152701

ABSTRACT:
This invention comprises a system to compensate for the noise level inside a vehicle by measuring the music level and the noise level in the vehicle through the use of analog to digital conversion and adaptive digital filtering, including a sensing microphone in the vehicle cabin to measure both music and noise; preamplification and analog to digital (A/D) conversion of the microphone signal; A/D conversion of a stereo music signal; a pair of filters that use an adaptive algorithm such as the known Least Mean Squares ("LMS") method to extract the noise from the total cabin sound; an estimation of the masking effect of the noise on the music; an adaptive correction of the music loudness and, optionally, equalization to overcome the masking effect; digital to analog (D/A) conversion of the corrected music signal; and transmission of the corrected music signal to the audio system.

REFERENCES:
patent: 4553257 (1985-11-01), Mori et al.
patent: 4672674 (1987-06-01), Clough et al.
patent: 4837834 (1989-06-01), Allie
patent: 4868881 (1989-09-01), Zwicker et al.
patent: 4965834 (1990-10-01), Miller
patent: 5018202 (1991-05-01), Takahashi et al.
patent: 5434922 (1995-07-01), Miller et al.

Affiliated with

Also associated with

Rating

Method and apparatus for dynamic sound optimization does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for dynamic sound optimization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for dynamic sound optimization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2210709