Vehicle-mounted three dimensional sound field reproducing silencing unit
US7440578B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2001 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Oct 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A vehicle-mounted three dimensional sound signal reproducing•silencing unit includes at least two speakers disposed for each of seats to be occupied by listeners so as to generate a three dimensional sound field space in a region inclusive of left and right external ears of each of the listeners, and three dimensional signal processing means for converting an output signal from a sound source into a three dimensional sound field signal for supplying it to each of the speakers, thereby reproducing a three dimensional sound field with rich presence for each of the seats. The unit also includes antiphase signal generating means for supplying a silencing signal to the three dimensional signal processing means, thereby silencing sounds for each of the seats without giving an effect on the other seats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.