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In this paper low-frequency analysis is addressed in order to explore components of continuous speech signals, trying to making evident the changes in the spectrum, which could be associated to the tremor in speech of people with Parkinson's disease. Four time-frequency (TF) techniques based on WignerVille distribution (WVD) are used for the characterization of the low frequency content of the speech...
In this paper, we explore the information provided by a joint acoustic and modulation frequency representation, referred as modulation spectrum, for detection of people with Parkinsons disease through speech signals. The set of features includes the centroids and the energy content of different frequency bands in the modulation spectra of the recordings. Additionally, with the aim to eliminate possible...
This paper presents a system for the automatic assessment of voice quality, according to the GRBAS scale, which considers different speech measures. The set of features includes the centroids and the energy content of different frequency bands in the modulation spectra of the recordings, Mel-frequency Cepstral Coefficients, Harmonics to Noise Ratio, Normalizes Noise Energy and Glottal to Noise Excitation...
Emotional states produce physiological alterations in the vocal tract introducing variability in the acoustic parameters of speech. Emotion recognition in speech can be used in human-machine interaction applications, speaker verification, analysis of neurological disorders and psychological diagnostic tools. This paper proposes the use of Mel Frequency Cesptral Coefficients (MFCC) for automatic detection...
Cleft lip and palate, due to morphological problems, allow the passage of air through the nasal cavity, introducing inappropriate nasal resonance during speech production and resulting in hypernasality speech.
Problems in voice production can appear due to functional disorders and laryngeal pathologies. The presence of laryngeal pathologies can causes significant changes in the vibrational patterns of the vocal folds and it is demonstrated that the impact of such pathologies can be reduced through continuous speech therapy. We propose a methodology based on non-parametric cepstral coefficients in Mel and...
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