Acoustic tube analysis of formant bandwidths and frequencies in helium speech
نویسندگان
چکیده
We use the lossy electric transmission—line analog model of the vocal tract to study the acoustics of speech produced in a hyperbaric helium— oxygen atmosphere. The analysis extends previous work by including more completely the effects of the wall vibration, glottal, and radiation impedances, and by analyzing the formant bandwidths and amplitudes in addition to the formant frequencies. It shows that (1) the classic Fant and Lindquist formula somewhat overstates the formant frequency shift when glottal and radiation effects are included; (2) the lower formant bandwidths increase by much more than commonly assumed; and (3) the upper formant amplitudes are higher relative to the lower formants in helium speech than in normal speech. These results are useful in developing advanced helium speech enhancement algorithms.
منابع مشابه
Statistical Variation Analysis of Formant and Pitch Frequencies in Anger and Happiness Emotional Sentences in Farsi Language
Setup of an emotion recognition or emotional speech recognition system is directly related to how emotion changes the speech features. In this research, the influence of emotion on the anger and happiness was evaluated and the results were compared with the neutral speech. So the pitch frequency and the first three formant frequencies were used. The experimental results showed that there are lo...
متن کاملAn Introduction to Speech Sciences (Acoustic Analysis of Speech)
Speech sciences deal with the acoustical characteristics of speech by means of sophisticated soft wares as well as hard wares. Although, a speech science is a well known science in the developed countries, especially the western societies, however, it has been remained almost unknown in Iran, though, in recent years a group of scholars have been involved in this branch of science. The applicati...
متن کاملAcoustic Analysis of Persian EFL Learners' Pronunciation of English Vowels
This paper reports the results of an experimental study on non-native production of English vowels. Two groups of Persian EFL learners varying in language proficiency were tested on their ability to produce the nine plain vowels of American English. Vowel production accuracy was assessed by means of acoustic measurements. Ladefoged and Maddison’s (1996) F1 F2 measurements for American English v...
متن کاملKARMA: Kalman-based autoregressive moving average modeling and inference for formant and antiformant tracking
Vocal tract resonance characteristics in acoustic speech signals are classically tracked using frame-by-frame point estimates of formant frequencies followed by candidate selection and smoothing using dynamic programming methods that minimize ad hoc cost functions. The goal of the current work is to provide both point estimates and associated uncertainties of center frequencies and bandwidths i...
متن کاملHelium speech unscrambling: a new perspective on factors affecting intelligiblity
The intelligibility of speech uttered in a hyperbaric helium-oxygen (heliox) respiratory mixture is affected in the main by an overall nonlinear frequency translation of the speech spectrum. Spectral resonances (formants) in the short-time spectrum of voiced speech in particular have generally been characterised by a deterministic nonlinear shift curve relating formant centre frequencies in nor...
متن کامل