Certain Effects of Alterations in Auditory Feedback

Publisher Website
Google Scholar
Abstract
Thirty-four subjects, comprising normal-speaking, articulation, voice, and stuttering groups read under 12 separate alterations of external auditory feedback involving sound pressure level [spl], transmission time, and frequency filtering, as well as a no alteration condition. Statistical analyses were made of total speech time, words/min., phonation/time ratio, mean syllable duration, average speech power, and speech power variability. Results indicated: the problem groups exhibited certain statistically significant differences in measured voice variables during alterations of auditory sidetone and during normal sidetone; certain effects of alterations and their sublevels were related to statistically significant differences between voice variable measures, by groups and within particular sublevels of alterations; there appeared to be a limited relationship between modifications of speech output of male and female groups in response to alterations of auditory feedback. Most interesting implications were: Generally, the no-alteration scores of the problem groups were different from those of the normal group; the voice problem group seemed least sensitive to sidetone alterations; the voice problem group was most sensitive to frequency filtering of their sidetone; in certain stutterers, various alternations of sidetone were accompanied by reduced numbers of blocks; reactions to increased spl of sidetone appeared to be different from reported reactions during an increased spl of ambient noise.

This publication has 10 references indexed in Scilit: