Sound control unit and sound system
US7050594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2002 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | May 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A motional feedback (MFB) signal control unit includes a vibration displacement calculating part which generates a vibration displacement detecting signal in response to the input of a vibration detecting signal from a vibration detecting coil of a speaker unit, a vibration speed calculating part which generates a vibration speed detecting signal in response to the input of the vibration detecting signal, a processed signal generating part which generates a feedback signal in response to the input of the vibration displacement signal and the vibration speed detecting signal, and an adder which adds the feedback signal to a sound signal outputted from a sound reproducing unit so as to input the sound signal to a driving voice coil of the speaker unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.