Speaker device and filter coefficient generating device therefor
US9118997B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2010 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Jan 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R27/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a speaker device that can form a substantially uniform sound field over a range from a long distance to a short distance without significantly increasing a calculation load. A plurality of FIR filters 21 to 2n perform delay control of respective speakers so as to increase a delay time difference between adjacent speakers 51 to 5n in a line array speaker 5 toward one end of the line array speaker 5, and thereby over a wide range from a long distance to a short distance, a sound filed 12 is formed. Also, by adding a common shift delay time Dc to filter coefficients for the FIR filters 21 to 2n, the delay time difference between adjacent speakers 51 to 5n is made less than a sampling period of a sound signal to form a wide and uniform sound field 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.