SOME INFLUENCES OF DELAYED SIDE-TONE UPON INTELLIGIBILITY.
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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Groups of listeners heard intelligibility tests in noise and in quiet. The speakers read with delays of .02 to .09 second introduced into their side-tone. The listener heard either the original saying or the original plus the delayed saying of speech material. Speech was received less accurately in every condition except when the speakers read with a .05, .08 or .09 second delay in their sidetone. Conclusions 1 Listeners hear words more accurately if words are received only as an original message superimposing an original and a delayed rendition of a word renders the word less intelligible under the delay times studies 2 The delay of .05 second in the side-tone of the speaker appeared to affect the reception of his speech benificially the intelligibility scores for this condition were significantly higher than at other delay times 3 An intelligibility increment similar to but less than that observed for the .05 second delay was present for the .08 and .09 second delay of side-tone 4 The effects of the delayed side-tone upon the intelligibility of a speaker became evident in a period of less than two minutes. Author