The purpose of this study was to examine the effect of reduced vowel working space on dysarthric talkers' speech intelligibility using both acoustic and perceptual approaches. In experiment 1, the acoustic-perceptual relationship between vowel working space area and speech intelligibility was examined in Mandarin-speaking young adults with cerebral palsy. Subjects read aloud 18 bisyllabic words...

Traditional hand-edited formant measurements may result in biased assessment of vowel formants in children’s speech. Therefore, vowel spaces that are constructed by hand-edited formant measures may be unreliable. The recent development of an automated frequency domain analysis method allows for more reliable measurements. Thus, a valid comparison of the size and positioning of young children’s ...

In previous work [1] we investigated the vowel structures of Japanese in both articulatory space and auditory perceptual space using Laplacian eigenmaps, and examined relations between speech production and perception. The results showed that the inherent structures of Japanese vowels were consistent in the two spaces. To verify whether such a property generalizes to other languages, we use the...

Vowel space data (A two dimensional F1/F2 plot) is of interest to phoneticians for the purpose of comparing different accents, languages, speaker styles and individual speakers. Current automatic methods used by speech technologists do not generally produce traditional vowel space models (See [6] for an overview); instead they tend to produce hyper dimensional code books covering the entire spe...

The purpose of this study was to develop a method for visualizing and assessing the characteristics of vowel production by measuring the local density of normalized F1 and F2 formant frequencies. The result is a three-dimensional plot called the vowel space density (VSD) and indicates the regions in the vowel space most heavily used by a talker during speech production. The area of a convex hul...

Russian exhibits a rich pattern of phonological vowel reduction, by which some vowel contrasts are neutralized in unstressed syllables. Recent work in phonology suggests a mechanism by which phonetic vowel reduction--compression of the overall vowel space due to target undershoot--might lead to patterns like Russian. Presenting acoustic data from 9 speakers of Russian, we use Euclidean distance...

Five vowels /i, , æ, (or ), u/ in isolated /CVC/ words produced by 7 American English (AmE) and 6 Australian English (AusE) talkers were examined with a view to documenting acoustic-phonetic similarities and differences between the two accent types. The effect of Accent was significant on all vowels for at least one of the first two formants. The AusE vowel space was much more compressed relati...