A Simplified Instrument for Pure-Tone Delayed Auditory Feedback

1967 ◽  
Vol 10 (1) ◽  
pp. 93-98
Author(s):  
Arthur N. Lewis ◽  
Vladimir Sipr
Keyword(s):  
Auditory Feedback ◽  
Pressure Transducer ◽  
Pure Tone ◽  
Tape Recorder ◽  
Delayed Auditory Feedback ◽  
Considerable Simplification ◽  
Tone Signal ◽  
Pressure Changes

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.

Modified Instrument for Pure-Tone Delayed Auditory Feedback

1964 ◽  
Vol 29 (3) ◽  
pp. 264-268 ◽  
Author(s):  
Lloyd L. Price ◽  
Oliver R. Wever
Keyword(s):  
Auditory Feedback ◽  
Pure Tone ◽  
Delayed Auditory Feedback

Some Factors That Influence Pure Tone Delayed Auditory Feedback

1963 ◽  
Vol 6 (3) ◽  
pp. 223-237 ◽  
Author(s):  
Howard B. Ruhm ◽  
William A. Cooper
Keyword(s):  
Auditory Feedback ◽  
Pure Tone ◽  
Stimulus Frequency ◽  
Physical Fatigue ◽  
Short Term ◽  
Delayed Auditory Feedback ◽  
Major Factors

Some of the major factors that might influence tapping changes induced by relatively short-term, pure tone delayed auditory feedback (DAF) were investigated. Stimulus frequency, subject, sex, sophistication, practice, physical fatigue, adaption to the task, and habituation to the task were considered. Only sophistication and habituation influenced performance significantly. The introduction of pure tone DAF within 5 dB SL, produced observable changes in tapping, thereby providing a sensitive means of extrapolating pure tone thresholds in a relatively objective manner.

Effects of Sophistication on Four Tests for Nonorganic Hearing Loss

1977 ◽  
Vol 42 (4) ◽  
pp. 528-534 ◽  
Author(s):  
Deborah A. Monro ◽  
Frederick N. Martin
Keyword(s):  
Hearing Loss ◽  
Auditory Feedback ◽  
Pure Tone ◽  
Normal Hearing ◽  
Delayed Auditory Feedback ◽  
Pure Tone Average

Three groups of 15 normal-hearing subjects were asked to simulate a hearing loss in one ear. Each subject was then tested on four measurements often used in determining the presence of pseudohypacusis (a comparison of the SRT to the pure-tone average, ascending vs descending pure-tone tests, the Stenger test, and pure-tone delayed auditory feedback). Results showed that as practice and sophistication on each of the procedures increased, there tended to be more improvement in the subjects' ability to “beat” some of the tests than others.

Apparatus Accurate Delays for Auditory Feedback Experiments

1967 ◽  
Vol 19 (1) ◽  
pp. 78-80 ◽  
Author(s):  
A. W. F. Huggins
Keyword(s):  
Auditory Feedback ◽  
Tape Recorder ◽  
Delayed Auditory Feedback ◽  
Electronic Timer

This note describes a way of modifying a tape recorder for producing accurately controllable delays for experiments with delayed auditory feedback. Any value of delay from 80 millisec. to 1.2 sec. can be obtained to the nearest millisec., and the range could be extended by some minor changes. The delay is continuously monitored on a digital electronic timer.

Influence on Motor Performance of Simultaneous Delayed and Synchronous Pure-Tone Auditory Feedback

1964 ◽  
Vol 7 (2) ◽  
pp. 175-182 ◽  
Author(s):  
Howard B. Ruhm ◽  
William A. Cooper
Keyword(s):  
Auditory Feedback ◽  
Motor Performance ◽  
Pure Tone ◽  
Stimulus Presentation ◽  
Random Order ◽  
Presentation Order ◽  
Delayed Auditory Feedback ◽  
Intensity Ratios

A study was made of the effect of the presentation order of delay/synchronous (DAF/SAF) intensity ratios on tapping performance under simultaneously presented synchronous and delayed auditory feedback. Comparisons were made between performances of groups who received either primarily positive or primarily negative DAF/SAF ratios in random order. Additional comparisons were made between subjects who received serially presented DAF/SAF ratios in an ascending series and those who were given the same stimuli in a descending DAF/SAF ratio series. It was found that, when synchronous and delayed auditory feedback are presented simultaneously at various DAF/SAF ratios, the presentation order influences the degree of performance disruption. It is concluded that the results of studies involving the use of simultaneously presented SAF and DAF should be interpreted in light of the stimulus presentation order.

Low Sensation Level Effects of Pure-Tone Delayed Auditory Feedback

1962 ◽  
Vol 5 (2) ◽  
pp. 185-193 ◽  
Author(s):  
Howard B. Ruhm ◽  
William A. Cooper
Keyword(s):  
Auditory Feedback ◽  
Pure Tone ◽  
Sensation Level ◽  
Delayed Auditory Feedback

Effects of Pure Tone Synchronous and Delayed Auditory Feedback on Keytapping Performance to a Programmed Visual Stimulus

1966 ◽  
Vol 9 (4) ◽  
pp. 596-603 ◽  
Author(s):  
Raymond S. Karlovich ◽  
James T. Graham
Keyword(s):  
Visual Stimulus ◽  
Auditory Feedback ◽  
Pure Tone ◽  
Visual Signal ◽  
Delayed Auditory Feedback ◽  
Delay Times ◽  
Auditory Signals ◽  
Female Subjects

Thirty-two female subjects tapped on a felt-padded key to a programmed repetitive flashing visual signal under various conditions of pure tone SAF and DAF. Two SLs of sound, 20 dB and 60 dB, and seven conditions of auditory feedback were employed (two SAF and five DAF conditions). Data were obtained concerning the relationships among tapping rates, delay times, and SLs of auditory signals.

Delayed Auditory Feedback with Different Delay Times at Each Ear

1964 ◽  
Vol 7 (4) ◽  
pp. 369-371
Author(s):  
Samuel Fillenbaum
Keyword(s):  
Delay Interval ◽  
Auditory Feedback ◽  
Normal Subjects ◽  
Delayed Auditory Feedback ◽  
Delay Times

Binaurally asynchronous delayed auditory feedback (DAF) was compared with synchronous DAF in 80 normal subjects. Asynchronous DAF (0.10 sec difference) did not yield results different from those obtained under synchronous DAF with a 0.20 sec delay interval, an interval characteristically resulting in maximum disruptions in speech.

Effects of delayed auditory feedback on immediate and delayed recall and recognition.

1968 ◽  
Vol 76 (2, Pt.1) ◽  
pp. 273-276 ◽  
Author(s):  
Charles H. Williams ◽  
Gerald Frincke
Keyword(s):  
Auditory Feedback ◽  
Delayed Auditory Feedback ◽  
Delayed Recall
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