Air leak self-diagnosis for a communication device
US7570769B2 · kind B2 · utility
3Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2004 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Oct 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A communication device (100) is provided with a technique (400) for self-diagnosing an air leak. The leak is determined without having to open the communication device by applying a temporary excitation signal to the speaker terminals (402) to produce a damped response (404) and then monitoring the damped response (406) of the speaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.