This investigation involves the photography of pitch, intensity, and duration changes in about 80 poor speaking voices and 60 good speaking voices to ascertain basic differences that will indicate procedures for remedial purposes. The voices studied were the best and the poorest among 970 freshmen at the University of Iowa as rated and described by speech pathologists of the university staff. By means of a procedure worked out by Tiffin and others, a synonymous intensity, a pitch, and duration record of each syllable is photographed on a single strip of sensitized paper six inches wide
