Sound reproducing systems utilizing acoustic processing unit
US4347405A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1980 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Aug 15, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S84/27
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for reproducing a plurality of electro-acoustic signals each corresponding, for example, to a channel signal of a multichannel electronic keyboard instrument, includes an acoustic processing unit which comprises a plurality of electro-acoustic transducers, one for each signal, so arranged within a substantially sealed enclosure as to convert the electro-acoustic signals to corresponding acoustic signals and to mix them to produce a pair of composite sound signals each containing at least one dominant component corresponding to an applied electro-acoustic signal and sub-dominant components related to other applied electro-acoustic signals. In one embodiment, a pair of acoustic transmission paths are provided for coupling the composite sound signals to the left and right ears, respectively, of a listener. The sound image felt by the listener is localized externally of the head of the listener and simulates what the listener would experience if the multiple channels were separately acoustically reproduced in a listening room. In another embodiment the two composite sound signals are converted into corresponding electro-acoustic signals which may be applied to respective power…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.