Patents Assigned to Noise Cancellation Tech
  • Selective active cancellation system for repetitive phenomena
    Patent number: 4878188
    Abstract: A cancellation system including a processor having single adaptive filters adapting its filtering characteristic as a function of a phenomena signal and phenomena timing signal and a phase circuit to maintain the adapting of the filtering characteristics within 90 degrees phase of the phenomena signal. The phase circuit has the capability to measure the delays of the processor and the environment.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: October 31, 1989
    Assignee: Noise Cancellation Tech
    Inventor: Eldon Ziegler, Jr.