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Whispered speech is a relatively common form of communications, used primarily to selectively exclude or include potential listeners from hearing a spoken message. Despite the everyday nature of whispering, and its undoubted usefulness in vocal communications, whispers have received relatively little research effort to date, apart from some studies analyzing the main whispered vowels and some q...

PURPOSE This article integrates published acoustic data on the development of vowel production. Age specific data on formant frequencies are considered in the light of information on the development of the vocal tract (VT) to create an anatomic-acoustic description of the maturation of the vowel acoustic space for English. METHOD Literature searches identified 14 studies reporting data on vow...

PURPOSE A large body of literature has indicated vowel space area expansion in infant-directed (ID) speech compared with adult-directed (AD) speech, which may promote language acquisition. The current study tested whether this expansion occurs in storybook speech read to infants at various points during their first 2 years of life. METHOD In 2 studies, mothers read a storybook containing targ...

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...

Previous research has established that naturally produced English clear speech is more intelligible than English conversational speech. The major goal of this paper was to establish the presence of the clear speech effect in production and perception of a language other than English, namely Croatian. A systematic investigation of the conversational-to-clear speech transformations across languag...

Cerebral palsy (CP) is a developmental motor disorder and the study of the speech characteristics and developmental speech patterns may provide valuable information on early speech development. Vowels appear early in speech development and they are central to the understanding of the acoustic properties of speech. Therefore, the current study aimed to examine the differences of vowel formant fr...

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 ...