Patents by Inventor Philippe Derogis

Philippe Derogis 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 for the diffusion of a sound with a given density
    Patent number: 5793876
    Abstract: To obtain a directivity pattern representing the directivity of an original or virtual sound source, directivity patterns of different sources are composed algebraically. To take account of the progress of the directivity patterns of sources that differ with the frequency, the signals applied to these sources are filtered so that the composite directivity function represents the expected directivity pattern throughout the spectrum. The coefficients of the filters are determined by a method of optimization in modulus and in phase.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: August 11, 1998
    Assignee: France Telecom
    Inventors: Philippe Derogis, Rene Causse, Olivier Warusfel