Method and apparatus for dynamic sound optimization
摘要
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.
申请公布号
US5434922(A)
申请公布日期
1995.07.18
申请号
US19930044643
申请日期
1993.04.08
申请人
MILLER, THOMAS E.;KANTOR, KENNETH L.;BARISH, JEFFREY;WISE, DUANE K.
发明人
MILLER, THOMAS E.;KANTOR, KENNETH L.;BARISH, JEFFREY;WISE, DUANE K.