Loudspeaker system equalization
US4130726A · kind A · utility
16Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Jun 29, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G5/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Variations in the amplitude-frequency response characteristic of a loudspeaker are compensated by a drive circuit in which an audio input signal is summed with a plurality of delayed replicas of the input signal to provide a drive signal for the loudspeaker. The delayed replicas are derived by discrete time filtering. Noise reduction techniques applied to the least delayed of the plurality of delay signals substantially improves the S/N ratio in the drive signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.