Patents by Inventor Martin Dippel

Martin Dippel 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).

  • Audio loudness control system
    Patent number: 4466119
    Abstract: An audio loudness control system for processing a broad dynamic range of audio input signals (e.g. 70 to 100 dB) comprises a gain-controlled amplifier, a feed forward control signal generator having an audio signal input that develops a feed forward gain control signal having an amplitude representative of long-term input excursions of the audio signal above a predetermined loudness threshold, a feedback control signal generator having an input from the audio output of the amplifier that develops a feedback gain control signal having an amplitude representative of transient output signal excursions above the loudness threshold, and a selector gate that selects the gain control signal of instantaneously higher effective magnitude and applies the selected gain control signal to the gain control input of the amplifier.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: August 14, 1984
    Assignee: Industrial Research Products, Inc.
    Inventors: Richard W. Peters, Martin Dippel