Loudness control circuit for an audio device
US5172358A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1990 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Mar 2, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G9/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A loudness control circuit for an audio device used in a reproduction circuit for reproducing a music signal recorded on a recording medium comprises one or plural level detection circuits for detecting levels of signal components of low and high frequency regions of a reproduced signal and control circuits for controlling the levels of the signal components of low and high frequency regions of the reproduced signal in response to outputs of the level detection circuits. The level control is made in accordance with a sound-pressure level for each frequency region of a reproduced signal so that an optimum compensation of the level in response to the sound-pressure level becomes possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.