Warning siren for vehicle

The method involves generating an electrical control signal having increasing and decreasing frequency signal portions (51, 53) whose instantaneous frequencies increase and decrease, respectively. The control signal has constant frequency signal portions (52, 54) whose instantaneous frequencies are...

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Bibliographic Details
Main Authors TESSIER, BRUNO, CARACCIOLO, ARNAUD
Format Patent
LanguageEnglish
French
German
Published 03.05.2006
Subjects
ALARM SYSTEMS
FOR PERFORMING MECHANICAL WORK IN GENERAL
GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY
ORDER TELEGRAPHS
PERFORMING OPERATIONS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TRANSPORTING
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Summary:The method involves generating an electrical control signal having increasing and decreasing frequency signal portions (51, 53) whose instantaneous frequencies increase and decrease, respectively. The control signal has constant frequency signal portions (52, 54) whose instantaneous frequencies are equal to a resonant frequency of a sound production device or to a sub-multiple of the resonant frequency. An independent claim is also included for a siren having a sound production device.
Bibliography:Application Number: EP20040292551