Sound system with isolation of dimensional sub-speakers
US4759066A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | May 27, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker system for reproducing stereophonic sound having an expanded acoustic image has left and right main speakers and left and right dimensional speakers. The main speakers are fed the right and left channel signals R and L and the dimensional speakers are fed the difference signals R - L and L - R. Interspeaker cabling includes one or more transformers used to develop and couple the difference signals to the dimensional speakers, which serve as isolation means and also suppress the -R and -L components of the difference signals for low frequencies. The loudspeaker system is particularly suited for automobile installations where the main speakers are in front and the dimensional speakers in the rear of the automobile interior, or vice versa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.