Parameters of auditory feedback

Adult speakers participated in three feedback conditions: Lombard, sidetone amplification, and delayed auditory feedback (DAF). All the procedures affected vocal intensity significantly, but only DAF caused changes in syllable rate. The three conditions did not provide equivalent data. Performance on any one of the feedback procedures was not predictive of performance on the others. Generalizations concerning auditory feedback must, therefore, take account of the particular method used and the parameter of speech studied.