John L. Fitch

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The purpose of the study was to explore an interaction between pathologic voice type and the acoustic prediction of dysphonic severity. One hundred and two phonatory samples, representing a wide range of laryngeal conditions, were categorized by listeners into three voice types: breathy, rough, and hoarse. A second group of trained listeners rated the(More)
We hypothesized that acoustic measures would predict dysphonic severity with differential results for pathological voice types. An instructional program based upon synthesized voice signals was developed to facilitate an awareness of prototypical voice types. Eighty phonatory samples representing normal subjects as well as patients with unilateral vocal(More)
Considering the widespread use of the sustained vowel in the evaluation of voice disorders, our objective was to study the degree to which the vowel is representative of voice in continuous speech. Phonatory samples were recorded from 20 normal subjects and 60 patients representing commonly occurring voice problems (nodules, unilateral paralysis, and(More)
This study was undertaken to identify the acoustic correlates of the diphthongs /aI/ and /contains as a subset I/ in individuals who were trained to "style shift" between Standard American English (SAE) and Southern English (SE). The diphthongs were produced by four individuals from the coastal southern dialect region who were selected from among those who(More)
Three studies involving the manipulation of the acoustic spectrum of speech are described. An array of electronic equipment was set up which signaled the presence or absence of certain frequency characteristics of speech. Subjects (Ss) were given feedback for production of speech containing targeted frequencies. The studies demonstrated that acoustic(More)
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