Reducing resonance
US9414156B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2012 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | May 17, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques are described for processing an audio signal to reduce the total harmonic distortion caused when it is reproduced by a loudspeaker, which is located within an audio reproduction device having an enclosure with an associated resonant frequency. After receiving the input audio signal, which includes the resonant frequency of the enclosure, the level of the input audio signal at the resonant frequency is reduced, thereby producing a first processed signal. In addition, the level of said input audio signal is reduced at all frequencies, producing a second processed signal. The first and second processed signals are combined to produce an output audio signal. The degree to which the level of the audio signal at both the resonant frequency and at all frequencies is reduced may be dependent upon the current volume level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.