Soundstage boundary expansion system
US4586192A · kind A · utility
20Cited by
7References
9Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Jan 27, 1984 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Jan 27, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for providing the effect of an extended soundstage comprises a pair of stereophonic loudspeakers, each having a movable or vibrational element driven by a pair of voice coils including a principal or main voice coil and an auxiliary or enhancement voice coil. The principal voice coil of each speaker is driven in a customary manner from one channel of a stereophonic amplifier, while the enhancement voice coil is driven in a reversed phase sense from the output of the opposite channel, and sound is effectively provided over an extended apparent source having dimensions beyond the spacing between the loudspeakers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.