Cooling fan control strategy for automotive audio system
US6608906B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2001 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Jan 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The masking-effect of loud audio passages is utilized to reduce the audibility of the fan noise from a cooling fan in an audio system. A power monitor determines an output power of an audio amplifier and generates a power signal proportional to the output power. A switchable cooling fan is positioned to provide a cooling flow of air within the audio system when the cooling fan is turned on. A fan control is coupled to the power monitor and the switchable cooling fan. The fan control compares the power signal with a predetermined threshold and turns on the switchable cooling fan in response to the comparison indicating that reproduction of the amplified audio signals is at an output power level that will substantially mask audible noise created by the switchable cooling fan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.