Mobile sound field correcting device
US4648117A · kind A · utility
37Cited by
0References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | May 31, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound field correcting device for use in a stereophonic system intended for vehicular use. Speakers are installed on opposite sides of both the front and rear seats of the vehicle. The number of persons seated in the vehicle is determined and applied to a correcting unit. When plural persons are seated in the vehicle, the sound pressure levels in the high-frequency range of loudspeakers is increased. Also, the sound pressure levels of the speakers can be corrected in accordance with the positions at which persons are seated in the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.