Dynamic reduction of loudspeaker distortion based on psychoacoustic masking
US11812239B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Apr 30, 2020 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Nov 16, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/01
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A processor-based method of reducing loudspeaker-induced harmonic distortion in sound generated by a loudspeaker responsive to a first audio signal, the method including: attenuating a first band in the first audio signal by an attenuation gain, the first band including a fundamental frequency, wherein the attenuating dynamically adjusts the attenuation gain in accordance with, at least, a ratio between: i) an energy of the first band in the first audio signal; and ii) an energy of a second band in the first audio signal, the second band including one or more frequencies that is an integer multiple of the fundamental frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.