Process and device for focusing acoustic waves
US6198829A · kind A · utility
7Cited by
12References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Jan 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R27/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Public announcements are made in a space using n speakers after having determined the impulse response h.sub.ij (t) between a plurality of calibration points j belonging to the space and each speaker i. To transmit an information-bearing acoustic signal S(t) through at least one target area in the space in which announcements are to be made, each speaker i is made to transmit a signal (a), where j is an index representing calibration points in the target area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.