Loudspeaker telephone equalization method and equalizer for loudspeaker telephone
US7327840B2 · kind B2 · utility
0Cited by
5References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Jul 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/6033
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An equalizer for a loudspeaker telephone includes a signal generator for generating a reference signal for broadcast by a loudspeaker of the loudspeaker telephone. A filter alters the frequency response of signals prior to broadcast by the loudspeaker. During set-up, a processor processes the reference signal picked up by a microphone remote from the loudspeaker that has been convolved with the acoustical response of the environment to determine coefficients for the filter that are necessary to compensate for the environment acoustics and applies the coefficients to the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.