Patents by Inventor J. Raul Martinez

J. Raul Martinez has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5363451
    Abstract: An apparatus for reducing noise characterized by a number of input microphones arranged near an undesired noise source, a signal processor coupled to the input microphones and operative to develop a number of output signals from the input signals, and a number of speakers coupled to the output signals of the signal processor to produce anti-noise within a designated quiet zone. Each of the speakers derives a portion of its signal from each of the input microphones so that each output transducer has the maximum amount of information concerning the noise to be canceled. The method of the invention is characterized by the steps of detecting compression waves at a number of detection locations within a medium, and developing a number of complementary signals utilizing all of the detected compression wave information.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: November 8, 1994
    Assignee: SRI International
    Inventors: J. Raul Martinez, V. Bradford Mason
  • Patent number: 5224168
    Abstract: An apparatus for reducing noise characterized by a number of input microphones arranged near an undesired noise source, a signal processor coupled to the input microphones and operative to develop a number of output signals from the input signals, and a number of speakers coupled to the output signals of the signal processor to produce anti-noise within a designated quiet zone. Each of the speakers derives a portion of its signal from each of the input microphones so that each output transducer has the maximum amount of information concerning the noise to be canceled. The method of the invention is characterized by the steps of detecting compression waves at a number of detection locations within a medium, and developing a number of complementary signals utilizing all of the detected compression wave information.
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: June 29, 1993
    Assignee: SRI International
    Inventors: J. Raul Martinez, V. Bradford Mason