On-device loudspeaker reference resistance determination
US12348940B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2022 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Jul 12, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This disclosure provides techniques for determining a reference resistance of a loudspeaker, such as in a mobile device. The reference resistance value may be used, among other applications, for speaker protection by reducing overdrive of the loudspeaker beyond safe temperature, which could damage the loudspeaker, while allowing driving of the loudspeaker closer to safety limits to improve performance of the loudspeaker. In a first aspect, a method of audio device monitoring includes applying a first signal to a loudspeaker; measuring a voltage and a current for the loudspeaker while applying the first signal to the loudspeaker; and determining a reference resistance for the loudspeaker based on the voltage and the current. Other aspects and features are also claimed and described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.