Method for estimating fundamental resonance frequency of loudspeaker and associated loudspeaker controller
US11570563B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2021 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Jul 22, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/309
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker controller for estimating a fundamental resonance frequency of a loudspeaker includes: an amplifier circuit, arranged to generate a driving signal of the loudspeaker according to an audio input signal; a sensing circuit, arranged to sense characteristics of the driving signal to generate a measurement signal; a plurality of band pass filter circuits, arranged to filter the measurement signal to generate a plurality of filter outputs, respectively, wherein the plurality of band pass filter circuits have different passbands; and an estimation circuit, arranged to estimate the fundamental resonance frequency according to the plurality of filter outputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.