In this study vowels in /CVC/ environments are compared with steady state vowels to investigate the perceived vowel quality change caused by undershoot. This study uses a perceptual task, whereby listeners match constant /CVC/ stimuli of /bVb/ or /dVd/ to variable /#V#/ stimuli, using a schematic grid on a PC screen. The grid represents an acoustic vowel diagram, and the subjects change the F1/...

In this paper, changes in acoustic characteristic of young children speech are investigated as a function of age. We examined fundamental frequency, formant frequencies and vowel durations of ten monophtongal vowels from American-English speaking children, age groups 3 to 6. In this study, we also examined the vowel pronunciation variability of young-aged children. The results show that prescho...

Mobile device based personalized equalizer for improving the hearing capability of human voices in particular for elderly persons are proposed. Through experiments, it is found that the proposed equalizer does work well for improving hearing capability by 2 to 55 % of voice Recognition success ratio. According to the investigation of the frequency component analysis and formant detections, most...

Compared to the amount of research on Korean consonants, few studies indeed have been done to analyze Korean vowels. In addition, the results of recent studies are mixed. This study was conducted for reviewing the Korean vowel system. In this study, we measured the formant frequencies of eight Korean vowels by three Seoul dialect female speakers of Korean in their early 30s, and compared the re...

Speech is one of the prevalent communication mediums for humans. Identifying the gender of a child speaker based on his/her speech is crucial in telecommunication and speech therapy. This article investigates the use of fundamental and formant frequencies from sustained vowel phonation to distinguish the gender of Malay children aged between 7 and 12 years. The Euclidean minimum distance and mu...

It is shown that within-speaker variations in vocal effort and phonation affect fundamental frequency (F0) and the formant frequencies of vowels in the sense of a linear compression/expansion of the spectral separations between them, given an adequate scaling of pitch. Between-speaker variations in size correspond to a translation of the spectral peaks shaped by F0 and the formants if pitch is ...

Few studies address the influence of postural changes on the vocal mechanism, and where they do so, they most often neglect the acoustic implications. This study tested participants in upright, prone and supine posture and assessed the resulting changes in formant frequencies and F0. Results show that while most formants appear to be subject to compensation strategies by the speaker, F3 differs...

In this paper, we propose a new method for accurate detection, estimation and tracking of formants in speech signals using time-varying quasi-closed phase analysis (TVQCP). The proposed method combines two different methods of analysis namely, the time-varying linear prediction (TVLP) and quasiclosed phase (QCP) analysis. TVLP helps in better tracking of formant frequencies by imposing a time-c...

December 13-15, 2007: Firenze, Italy, ed. by C. Manfredi, ISBN 978 88-8453-673-3 (print) ISBN 978-88-8453-674-7 (online) © Firenze university press, 2007. Abstract: The presentation concerns the estimation of the vocal tract length of a speaker on the base of her formant frequencies and the formant frequencies and known tract length of a reference speaker. The length prediction is founded on a ...

In this paper, changes in acoustic characteristic of young children speech are investigated as a function of age. We examined fundamental frequency, formant frequencies and vowel durations of ten monophtongal vowels from American-English speaking children, age groups 3 to 6. In this study, we also examined the vowel pronunciation variability of young-aged children. The results show that prescho...