Patents by Inventor Eric L. Shumard

Eric L. Shumard 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).

  • Method and apparatus for achieving active noise reduction
    Patent number: 8249265
    Abstract: A system and method for actively changing the sound perceived by listeners in an audio environment. A single transducer is used as both a sensing microphone and as an output driver. In one embodiment, the invention is implemented as an active noise cancellation system. The sensed noise signals are phase shifted to provide a cancellation effect, combined with the desired audio program signals, and output to the transducer, thereby reducing the level of unwanted noise heard by they listener. In other embodiments, the system can be used to sense the frequency response of a listening room and make appropriate equalization adjustments to the output.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: August 21, 2012
    Inventor: Eric L. Shumard
  • METHOD AND APPARATUS FOR ACHIEVING ACTIVE NOISE REDUCTION
    Publication number: 20080069368
    Abstract: A system and method for actively changing the sound perceived by listeners in an audio environment. A single transducer is used as both a sensing microphone and as an output driver. In one embodiment, the invention is implemented as an active noise cancellation system. The sensed noise signals are phase shifted to provide a cancellation effect, combined with the desired audio program signals, and output to the transducer, thereby reducing the level of unwanted noise heard by they listener. In other embodiments, the system can be used to sense the frequency response of a listening room and make appropriate equalization adjustments to the output.
    Type: Application
    Filed: September 17, 2007
    Publication date: March 20, 2008
    Inventor: Eric L. Shumard