EP 2003633 A1 20081217 - Emergency vehicle alert system
Title (en)
Emergency vehicle alert system
Title (de)
Notalarmsystem für ein Fahrzeug
Title (fr)
Système d'alerte d'un véhicule d'urgence
Publication
Application
Priority
EP 07011424 A 20070612
Abstract (en)
The emergency vehicle alert system may be used for detection of selected sound frequency signals emitted by warning devices of vehicles. A sensor may sense a selected sound frequency signal spectrum and may be in communication with multiple operational amplifiers. The operational amplifiers may be biased to detect a warning device sound source within 50 feet and within 1,500 feet of the sensor, The detection of a warning device sound source may be communicated to a warning indicator to activate the warning indicator.
IPC 8 full level
G08G 1/0965 (2006.01)
CPC (source: EP)
G08G 1/0965 (2013.01)
Citation (search report)
- [X] WO 9931637 A1 19990624 - SENTEC CORP [US]
- [X] US 4158190 A 19790612 - STEFANOV BORIS [US]
- [A] US 5278553 A 19940111 - CORNETT ROBERT H [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 07011424 A 20070612