Patents by Inventor Stephen Brackett

Stephen Brackett 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).

  • Combined active noise control and resonator
    Publication number: 20030178248
    Abstract: A vehicle air supply noise attenuation system utilizes both active and passive methods of noise attenuation. A helmholtz resonator communicates with an air supply duct, and is designed to attenuate a narrow band of noise. An active noise control system, including a speaker and an electronic controller, is mounted within the resonator volume and attenuates noise over a wider band of frequencies. The combination of the active and passive noise control attenuates noise over a wide band of frequencies without requiring an overly large speaker.
    Type: Application
    Filed: February 14, 2003
    Publication date: September 25, 2003
    Applicant: Siemens VDO Automotive, Inc.
    Inventors: John R. Mammarella, Stephen Brackett, Kenneth Burk