Stereophonic reproduction method and apparatus
US5553147A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1993 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | May 11, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2205/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for stereophonic reproduction uses conventional left and right stereophonic signals to energize a point source transducer in a complementary manner. The resultant interference sound pattern is interpreted by the brain of a listener to enable the listener to experience stereophonic hearing in a wide region surrounding the transducer, not just in the region of the plane of symmetry. A point source transducer may be simulated by a plurality of transducers positioned with the spacing therebetween less than a determinable maximum distance. While conventional stereophonic signals may be employed in the reproduction of sound, improved reproduction is obtained by producing the signals by recording sound with a pair of microphones arranged with the apogees of their respective field of polar response patterns facing substantially at 180.degree. to one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.