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.

Differential Sensitivity to Auditory Feedback Delay Intervals: A Preliminary Study

1968 ◽  
Vol 11 (3) ◽  
pp. 595-599 ◽  
Author(s):  
John H. Saxman
Keyword(s):  
Delay Interval ◽  
Auditory Feedback ◽  
Speech Signal ◽  
Relative Sensitivity ◽  
Differential Sensitivity ◽  
Feedback Delay ◽  
Delayed Auditory Feedback ◽  
Interval Change ◽  
Delay Times ◽  
Preliminary Study

Differential sensitivity to delay interval change (jnd) was assessed for six subjects at 12 standard delay times ranging from 30 msec to 360 msec. The speaker’s self-generated speech signal (/da/) and its return via delayed auditory feedback constituted the interval boundaries. Mean absolute jnd’s varied in magnitude from 15.45 msec to 19.66 msec and were found to be independent of the standard delay times. The relative sensitivity (ΔD/D) to delay change decreased rapidly at the shorter delay times, then leveled off to a fairly gradual slope beginning at approximately 150 msec.

Perception of Auditory Feedback Delay: Subjective Estimate of Delay Magnitude

1968 ◽  
Vol 11 (4) ◽  
pp. 861-868 ◽  
Author(s):  
John H. Saxman ◽  
Theodore D. Hanley
Keyword(s):  
Delay Interval ◽  
Auditory Feedback ◽  
Delay Time ◽  
Feedback Delay ◽  
Delayed Auditory Feedback ◽  
Physical Time ◽  
Subjective Estimate ◽  
Speech Response ◽  
Female Subjects

Twenty female subjects were required to select, by the method of fractionation, the delay interval judged by them to be one-half the duration of the standard delay interval with which it was paired. The signals judged were the delay intervals between the subjects' own production of the syllable /da/ and its return via delayed auditory feedback. Ten ascending and ten descending one-half judgments were obtained for each subject at each of tie standard delay intervals of 100, 200, 400, and 800 msec. The curves for the ascending, descending, and combined ascending-descending judgments, when plotted against delay intervals in physical time, were all nearly linear with a slight positively accelerated slope. A tentative scale of subjective delay time is described and its implications for evaluating the speech response to DAF as a function of time are noted.

Delayed Auditory Feedback Vocal Intensity Changes in Schizophrenia

1963 ◽  
Vol 109 (459) ◽  
pp. 240-242 ◽  
Author(s):  
F. G. Spear ◽  
R. L. Bird
Keyword(s):  
Auditory Feedback ◽  
Psychiatric Patients ◽  
Normal Subjects ◽  
Personality Factors ◽  
Delayed Auditory Feedback ◽  
Intensity Changes ◽  
Schizophrenic Patients ◽  
Vocal Intensity ◽  
Method Of Measurement ◽  
Clinical Correlations

When speech processes are interfered with by the technique known as Delayed Auditory Feedback (D.A.F.) various disturbances result (Lee, 1950, 1951). These have been intensively investigated and have been found to depend upon the delay and amplification of the feedback (Black, 1951) and upon personality factors (Beaumont and Foss, 1957; Spilka, 1954). These differences have been shown to extend into psychiatric diagnoses (Goldfarb and Braunstein, 1958; Spear, 1963) and it has been possible to demonstrate that schizophrenic patients show less increase in vocal intensity under conditions of D.A.F. than do other psychiatric patients and normal subjects. It was thought worth while to investigate this difference further, using a slightly more refined method of measurement of the parameter under consideration and to seek clinical correlations with the findings.

Delayed Auditory Feedback and the Speech of Stuttering and Non-Stuttering Children

1978 ◽  
Vol 46 (2) ◽  
pp. 551-555 ◽  
Author(s):  
Beverly A. Timmons ◽  
James P. Boudreau
Keyword(s):  
Analysis Of Variance ◽  
Auditory Feedback ◽  
Feedback Condition ◽  
Speaking Rate ◽  
Delayed Auditory Feedback ◽  
Difference Scores ◽  
Delay Times ◽  
Speaking Task

25 male stutterers and 25 male non-stutterers matched by age and speaking task, read or recited under normal and 113-, 226-, 306-, 413-, 520-msec. delayed auditory feedback conditions. Changes in speaking rate and disfluency count from normal to each delayed auditory feedback condition were calculated as indicators of reaction to delayed auditory feedback. Using an analysis of variance of difference scores for speaking rate, no significant differences were found between stutterers and non-stutterers or among the delays. An analysis of variance of disfluency difference scores showed no differences between stutterers and non-stutterers. Significant differences in disfluency reaction among delay times were found.

Speech Disfluencies under Normal and Delayed Auditory Feedback Conditions

1983 ◽  
Vol 56 (2) ◽  
pp. 575-579 ◽  
Author(s):  
Beverly A. Timmons
Keyword(s):  
Analysis Of Variance ◽  
Auditory Feedback ◽  
Repeated Measures ◽  
Original Sample ◽  
Delayed Auditory Feedback ◽  
Pearson Product Moment Correlation ◽  
Delay Times ◽  
Main Effects

20 male and 20 female adults, matched by age, read under conditions of normal and 113-, 152-, 200-, 253-, 307-, and 347-msec. delayed auditory feedback. Disfluency counts were correlated with delayed auditory feedback reactions which were changes in disfluencies under delay conditions. Pearson product-moment and Spearman's rhos were negative and significant for delay times of 113, 153, 200, and 253 msec. The Pearson product-moment correlation for 307 msec, was also negative and significant. Two groups of 11 adults were selected from the original sample on the basis of high and low initial disfluency counts. Their reactions to delayed auditory feedback were compared, using a 2-way analysis of variance with repeated measures (groups × delay times). Both main effects were significant but not their interaction.

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 Children

1980 ◽  
Vol 23 (4) ◽  
pp. 802-813 ◽  
Author(s):  
Gerald M. Siegel ◽  
Christine A. Fehst ◽  
Sharon R. Garber ◽  
Herbert L. Pick
Keyword(s):  
Delay Interval ◽  
Auditory Feedback ◽  
Developmental Pattern ◽  
Current Experiment ◽  
Older Children ◽  
Delayed Auditory Feedback ◽  
Sentence Repetition ◽  
Weak Evidence ◽  
Age Patterns ◽  
Repetition Task

There is a controversy in the literature concerning the effects of delayed auditory feedback (DAF) on the speech of subjects of varying ages, In the current experiment the subjects were five-year-olds, eight-year-olds and adult speakers who performed a sentence repetition task under: 0-delay, 250, 375, 500, and 625 msec of amplified delayed auditory feedback. All subjects performed the task under normal rate instructions and under instructions to speak as rapidly as possible. A developmental pattern emerged, with the youngest children significantly more affected by the DAF than the older children or the adults. There was only weak evidence for a critical delay interval that varied according to age of the subjects. Rate instructions had essentially no effect on the DAF or age patterns.

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