Patents by Inventor Timothy M. Russell

Timothy M. Russell 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 testing acoustical devices, including hearing aids and the like
    Patent number: 5703797
    Abstract: A method and apparatus for testing hearing aids under condition of actual use where a microprocessor is programmed to generate a warbled pure tone and analyses of the signal as processed by the device. The generated signal and a amplified signal by the hearing aid are analyzed by use of a digital Fourier transform (DFT) to arrive at the transfer function of the device in an setting approximating the environment of use and independent of extrinsic noise.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: December 30, 1997
    Assignee: Frye Electronics, Inc.
    Inventor: Timothy M. Russell