Patents by Inventor Torsten Johnsen

Torsten Johnsen 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 fitting of a hearing aid and associated probe with distance measuring means
    Patent number: 5044373
    Abstract: The invention relates to the measuring of sound pressure levels in the auditory canal of a person in connection with the fitting of a hearing aid. An apparatus for this purpose comprises a measuring probe (1) which is introduced into the auditory canal, a microphone (6) coupled to the measuring probe (1), a data processing unit (14) with display (15) and printer (15'), a reference microphone (8) and a source of sound (10). In order to be able to position the measuring probe (1) precisely in the auditory canal, the probe is configured with means for measuring the distance from the free end of the probe to the ear drum which employs either sound, electromagnetic waves or light.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: September 3, 1991
    Assignee: GN Danavox A/S
    Inventors: Allan Northeved, Torsten Johnsen