Patents by Inventor John David Durrant

John David Durrant 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).

  • Steady state measurement and analysis approach to profiling auditory evoked potentials from short-latency to long latency
    Patent number: 9662035
    Abstract: The present invention relates to methods and systems for profiling evoked potentials in brain electrical activity which apply steady state response concepts to analysis of longer latency responses reflective of activity of brain regions beyond the brainstem, up to an including the cortex. The use of repeated stimuli within a single analysis window produces a quasi steady-state response and permits a high-resolution spectral analysis. Response amplitudes were measured at repetition rates from 80 to below 1 Hz, using trains of repeated tone-burst stimuli. An amplitude measure introduced and defined as the harmonic sum was incorporated into the spectral power of the response carried by both the fundamental frequency, and the harmonics thereof. Additionally, time ensemble averaging can be employed to improve signal to noise ratio.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: May 30, 2017
    Assignees: Intelligent Hearing Systems, University of Pittsburgh—of the Commonwealth System of Higher Education
    Inventors: John David Durrant, Abreena Iris Tlumak, Rafael E. Delgado, John Robert Boston
  • STEADY STATE MEASUREMENT AND ANALYSIS APPROACH TO PROFILING AUDITORY EVOKED POTENTIALS FROM SHORT-LATENCY TO LONG LATENCY
    Publication number: 20120157877
    Abstract: The present invention relates to methods and systems for profiling evoked potentials in brain electrical activity which apply steady state response concepts to analysis of longer latency responses reflective of activity of brain regions beyond the brainstem, up to an including the cortex. The use of repeated stimuli within a single analysis window produces a quasi steady-state response and permits a high-resolution spectral analysis. Response amplitudes were measured at repetition rates from 80 to below 1 Hz, using trains of repeated tone-burst stimuli. An amplitude measure introduced and defined as the harmonic sum was incorporated into the spectral power of the response carried by both the fundamental frequency, and the harmonics thereof. Additionally, time ensemble averaging can be employed to improve signal to noise ratio.
    Type: Application
    Filed: November 30, 2011
    Publication date: June 21, 2012
    Applicant: UNIVERSITY OF PITTSBURGH - OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATION
    Inventors: John David Durrant, Abreena Iris Tlumak, Rafael E. Delgado, John Robert Boston