A Simplified Instrument for Pure-Tone Delayed Auditory Feedback Modified instrumentation for pure-tone delayed auditory feedback (DAF) is described. This equipment, which achieves considerable simplification over previous designs, retains tapping-pressure changes as an indication of performance disruption under DAF. A specially constructed key unit serves to connect a pure-tone signal to an earphone through a tape recorder fitted with ... Research Article
Research Article  |   March 01, 1967
A Simplified Instrument for Pure-Tone Delayed Auditory Feedback
 
Author Affiliations & Notes
  • Arthur N. Lewis
    The Royal Victorian Eye and Ear Hospital, Melbourne, Australia
  • Vladimir Sipr
    The Royal Victorian Eye and Ear Hospital, Melbourne, Australia
Article Information
Research Articles
Research Article   |   March 01, 1967
A Simplified Instrument for Pure-Tone Delayed Auditory Feedback
Journal of Speech, Language, and Hearing Research, March 1967, Vol. 10, 93-98. doi:10.1044/jshr.1001.93
 
Journal of Speech, Language, and Hearing Research, March 1967, Vol. 10, 93-98. doi:10.1044/jshr.1001.93

Modified instrumentation for pure-tone delayed auditory feedback (DAF) is described. This equipment, which achieves considerable simplification over previous designs, retains tapping-pressure changes as an indication of performance disruption under DAF. A specially constructed key unit serves to connect a pure-tone signal to an earphone through a tape recorder fitted with separate record and playback heads. The key-tapping unit also incorporates a pressure transducer (carbon granules capsule) which acts as one arm of a wheatstone pseudobridge. Hence resistance changes in the balance of the bridge are converted to stylus deflections on a graphic recorder.

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