Virtual sound imaging loudspeaker system
US7760895B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jan 24, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | May 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/345
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker system positioned to one side of a listener includes a closed-back tweeter supported in front of a concave reflective surface. The curvature of the surface is formed by vertical and parallel first and second sides of a rectangle wherein the first side is rotated around the second side as axis. The tweeter projects sound with hemispherical directionality away from the listener and toward the surface. Some of the sound projected by the tweeter is reflected off of the surface toward the listener at an angle of less than about 10° relative to a principal plane of the concavity. A low frequency range loudspeaker projects sound towards the listener generally at an azimuth nearly equal to that of a virtual center of radiation of the sound projected by the tweeter off of the concavity. Thereby, the listener localizes a well-defined sound image at a few meters behind the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.