The influence of voice volume, pitch, and speech rate on progressive relaxation training: application of methods from speech pathology and audiology

Applied Psychophysiology and Biofeedback (2006) - Comments
pubmed: 16941239 doi: 10.1007/s10484-006-9014-6 issn: 1090-0586 issn: 1573-3270

Glenn E. Knowlton, Kevin T. Larkin