Audio system end of line load module providing a load on the audio circuit in response to a test signal
US7602282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2006 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Nov 24, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An end-of-line module provided at the end of the line of an audio circuit provides a load in response to a test signal. The load is detectable by an announcement control system so that a fault indication may be triggered in the event the announcement control system does not sense the end-of-line module as being connected to the audio circuit and detects an interruption in the audio circuit. In addition, the end-of-line module may include an over-temperature sensor or protection device to prevent the audio circuit from exceeding a predetermined limit, for example, a temperature level assigned to insure compliance with fire, safety and other standards or specifications. A fault or other indication may be reported to or sensed by the announcement control system and may be further processed in a manner appropriate for the application and/or facility having the announcement control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.