Selective Vocal Effects Of Delayed Auditory Feedback

Abstract

Sixteen young males, lower division college students, were subjected to 5 side tone delays: 1. an undelayed feedback, and delays of .1, .2, .4, and 8 seconds. Delayed auditory feedback results in various types of speech disturbances among which are increased number of articulatory errors, longer duration, greater sound pressure, and higher fundamental frequency. Disturbances of articulation and duration were probably direct effects. Correct word rate is proposed as a single inverse measure of disturbance that combines both direct effects of delayed auditory feedback.