this paper addresses the validity of two hypotheses concerning changes of vowel quality in persian. the theory of centralization claims that there is a strong correlation between vowel duration and vowel quality. as vowel duration is shortened in unstressed contexts, the size of the vowel inventory reduces toward the center, leading to considerable overlap between different categories and a red...

A combined vowel perception/vowel production study was designed to address the question of how variability in speech production relates to variability in speech perception. For the study, participants from three different U.S. dialect regions (North, South and West) completed an online vowel identification experiment. A subset of participants from each region also provided speech samples. In th...

the changing of round and back vowel /u/ to unround and front vowel [i] occurs in lori dialects as well as some other persian dialects. this vowel change includes both unrounding and fronting. this paper aimed at coming up with an inclusive ranking of constraints to explain occurrence and nonoccurrence of this vowel change in various phonological environments in silahkori dialect within optimal...

This study investigated the dynamic spectral patterns of vowels in Mandarin Chinese using a corpus of monosyllabic words spoken in isolation. Mel-frequency cepstral coefficients (MFCCs) were parameterized in different ways to test the nature of the dynamic information in vowels through automatic vowel classification. Compared to the MFCCs extracted at the vowel midpoint, using the MFCCs extract...

BACKGROUND Acoustic analysis had been well incorporated into clinical evaluation and management of children with speech disorders for many years. The aim of this study is to investigate developmental changes in vowel production in Mandarin-speaking children using acoustic study analysis. METHODS A total of 22 children from 5-12 years old were analyzed in this study. Each child read a list of ...

introduction: on the importance of the formant frequency, it is enough to say that the first three formants of a vowel and their internal relationships are the major components in detection of vowel type by listener. moreover, the quality of a vowel depends on its factorial frequencies. the main application of measuring factorial frequency is for description of vowel errors because recognizing ...

A long-term training paradigm in lipreading was used to test the fuzzy logical model of perception (FLMP). This model has been used successfully to describe the joint contribution of audible and visible speech in bimodal speech perception. Tests of the model were extended in the present experiment to include the prediction of confusion matrices, as well as performance at several different level...