The study found that stutterers (N=10) were significantly more variable than nonstutterers in their ability to achieve stable fundamental frequency diminution patterns in vowels immediately following stop consonants. Stutterers were not significantly different from the nonstutterers in their ability to achieve a stable fundamental frequency over…

The study examined the relationship between 28 segmental and suprasegmental acoustic parameters of speech production and measures of speech intelligibility for 40 severely to profoundly hearing-impaired persons (mean age 21 years). Findings support the tractability of employing selected acoustic variables for the estimation of speech…

This study compared self-ratings of speech intelligibility with measured speech intelligibility for 200 college students who were deaf or hard of hearing. Student responses to questions on a self-perception speech questionnaire were analyzed and compared with measured speech intelligibility estimates derived by a transcription procedure. The study…

The study of 35 posttreatment stutterers found that magnitude estimation and interval scaling were both valid procedures for measuring speech naturalness. Speech of nonstutterers was judged more natural than speech of treated stutterers. The acoustic parameters most highly correlated with speech naturalness were voice onset time measure and…

Eighty-four hearing-impaired postsecondary students were involved in a study of the criterion validity and reliability of the National Technical Institute for the Deaf rating scales for assessment of contextual speech intelligibility. Results revealed generally high overall validity and reliability coefficients, though write-down procedures were a…