Patents by Inventor Ian Alexander Low

Ian Alexander Low 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).

  • Hearing aid with amplitude compression achieved by clipping a modulated signal
    Patent number: 4052571
    Abstract: A hearing aid is arranged to restrict the dynamic range of the audio input signal to be compatible with the range which is characteristic of the hearing defect of the user. By means of phase-shift modulation for example, the input signal is converted to a single sideband at HF which is then peak-clipped to a predetermined value. The effective degree of clipping is determined by the AGC level of an input amplifier which is controlled by the user. The clipped signal is restored to the audio band for reproduction at a preset level.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: October 4, 1977
    Assignee: National Research Development Corporation
    Inventors: Richard Langton Gregory, Ian Alexander Low