Patents by Inventor Martin Gray Dennis

Martin Gray Dennis 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).

  • Low noise microphone for use in windy environments and/or in the presence of engine noise
    Patent number: 8116482
    Abstract: A microphone for use in windy environments. The microphone uses a transducer to flood the environment outside the microphone with a high frequency (such as an ultrasonic) acoustic field. The sounds desired to be detected are mixed with the high frequency carrier, and can then be received by the microphone with less wind noise. The microphone then demodulates the desired sound signals from the high frequency carrier. The microphone can be configured in a special emitter-receiver configuration that also reduces interference from engine noise.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: February 14, 2012
    Assignee: Southwest Research Institute
    Inventors: Stephen Anthony Cerwin, Martin Gray Dennis
  • LOW NOISE MICROPHONE FOR USE IN WINDY ENVIRONMENTS AND/OR IN THE PRESENCE OF ENGINE NOISE
    Publication number: 20080212819
    Abstract: A microphone for use in windy environments. The microphone uses a transducer to flood the environment outside the microphone with a high frequency (such as an ultrasonic) acoustic field. The sounds desired to be detected are mixed with the high frequency carrier, and can then be received by the microphone with less wind noise. The microphone then demodulates the desired sound signals from the high frequency carrier. The microphone can be configured in a special emitter-receiver configuration that also reduces interference from engine noise.
    Type: Application
    Filed: August 28, 2007
    Publication date: September 4, 2008
    Applicant: Southwest Research Institute
    Inventors: Stephen Anthony Cerwin, Martin Gray Dennis