Patents Assigned to Sy/Lert System Ltd.
  • Emergency signal warning system
    Patent number: 4956866
    Abstract: A siren detection system, particularly suited for installation in an automobile for providing a warning to the driver when an emergency vehicle is operating a siren in the vicinity of the automobile, utilizes a microphone on the automobile to detect the siren signals. An analog-to-digital conversion of the signal obtained from the microphone is supplied to a digital signal processor which is programmed to provide high selectivity of the frequency of the input signals, with improved noise rejection and improved frequency determination.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: September 11, 1990
    Assignee: Sy/Lert System Ltd.
    Inventors: Bernard Bernstein, Guy L. Sohie