System for increasing perceived loudness of speakers
US10299040B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2017 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Nov 13, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G7/002
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system can be provided for increasing loudness of an audio signal to present a perceived loudness to a listener that is greater than a loudness provided natively by a loudspeaker. The system can include one or more of the following: a frequency suppressor, a loudness adjuster, an equalizer, and a distortion control module. The frequency suppressor can increase headroom in the audio signal by filtering out low and/or high frequencies. The loudness adjuster can calculate a loudness of the audio signal and apply a gain to the audio signal to increase the loudness. The equalizer can further increase headroom by attenuating portions of a passband of the loudspeaker's frequency response. The distortion control module can induce partial harmonic distortion in the audio signal to further increase loudness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.