Circuit arrangement for adjusting the volume of an automobile radio receiver in dependence on road noise
US4179667A · kind A · utility
2Cited by
3References
7Claims
0Family size
Inventor
Key dates
| Filing date | Jan 24, 1978 |
| Grant date | Dec 18, 1979 |
| Priority date | — |
| Expiry date | Jan 24, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/32
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to a circuit arrangement for adjusting the volume of an automobile radio receiver in dependence on road noise, comprising a microphone which picks up the noise and emits an electric signal which is conducted by way of an amplifier, a rectifier and a time-controlled circuit, to a control-adjustment member contained in the low frequency channel of the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.