Patents by Inventor Donald Joseph Ashley

Donald Joseph Ashley 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).

  • Vacuum testing of audio devices
    Patent number: 9992592
    Abstract: A method of assessing noise involves evacuating air from a vacuum chamber to a pressure less than about 1 Torr and stimulating a device positioned in the chamber by shaking it or by operating a component of the device. Measuring vibrations in a low pressure environment decreases or eliminates propagation of sound waves, thereby enabling isolation and identification of vibrations caused by mechanical noise. These measurements may be useful for more precise acoustic characterization of audio devices containing multiple components.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: June 5, 2018
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventors: Mohammed Aftab Alam, Ramez Nachman, Vikram Srinivas, Donald Joseph Ashley, Ali-Reza Bahmandar