Method and apparatus for computing metric values for loudspeaker protection
US9185493B2 · kind B2 · utility
7Cited by
9References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2012 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Dec 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/001
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods thereof for obtaining metrics and an accurate threshold to prevent loudspeaker overheating, based on autocorrelation and cross-correlation of band-pass filtered current and voltage measurements are disclosed. The methods invented are based on instantaneous voltage and current measurements. The invention does not require a DC or pilot signal to be added to the audio signal in order to do perform the measurement, and it is not disturbed by capacitive or inductive components in the complex impedance of the voice coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.