Loudness control circuit

Details Loudness control circuit Loudness control circuit

1993-04-14

1994-06-28

Peng, John K.

Electrical audio signal processing systems and devices

Including frequency control

Automatic tone control

381 27, 381 98, H03G 900

Patent

active

053254406

ABSTRACT:
A loudness control circuit emphasizes low frequency components in audio signals. A secondary low-pass filter select low frequency components of the audio signals, inverting a phase of the audio signals. The phase-inverted signals and audio signals are respectively inputted to an inverting input terminal and non-inverting input terminal of an operational amplifier to obtain audio signals whose low frequency components are emphasized. These signals have the same phase as the phase of the inputted audio signals. The output of the low-pass filter is amplified to obtain a signal having low frequency components whose phase is inverted. Both the audio signal whose low frequency components have been amplified and the low frequency components whose phase has been inverted are applied to a speaker to reproduce sounds with their low frequency components dynamically emphasized.

REFERENCES:
patent: 3944941 (1976-03-01), Tsuda
patent: 4186273 (1980-01-01), Dodson
patent: 4891841 (1990-01-01), Bohn
patent: 4982435 (1991-01-01), Kato et al.
Linear Applications, vol. 1, Byerly and Kooi Dec. 1972, p. AN69-6.

Affiliated with

Also associated with

Rating

Loudness control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Loudness control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Loudness control circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2382819