Several studies have shown that motor-skill training over extended time periods results in reorganization of neural networks and changes in brain morphology. Yet, little is known about training-induced adaptive changes in the vocal system, which is largely subserved by intrinsic reflex mechanisms. We investigated highly accomplished opera singers, conservatory level vocal students, and laymen d...

Vocal tremor is defined as slow modulation of fundamental frequency or its amplitude [1, 2]. Even though vocal tremor may be attributed to neurological diseases, it may also be a natural stochastic modulation of voice. Many studies try to measure these modulations assuming that they are stationary. Hence, their analysis is limited to small intervals loosing important information about vocal tre...

A method is presented to estimate the effect of intentional raising of fundamental frequency (F0) on vocal intensity. The method, Energy of the Synthesised Period (ESP), is based on computation of the energy of a hypothetical speech sound synthesised using a single period of the glottal volume velocity waveform and a digital filter that models the vocal tract. Both the glottal flow and the voca...

Vocal load plays a significant role in the aetiology of voice disorders and influences the response to treatment. For this reason, many researchers have focused their attention on how a voice is used, especially when vocal load is increased, during working hours for instance. The majority of studies in this regard have been performed by recording vocal parameters for brief periods with the aid ...

INTRODUCTION briefly to indicate the variety of avian vocal systems, and to provide a perspective from which Songbirds have both an esthetic and a scientific to focus on the oscine songbirds. Readers impact on our lives. Birdsong adds beauty and interested in additional information on songbirds vitality to our environment, The possibility of should consult reviews of this subject (Nowicki its a...

OBJECTIVES/HYPOTHESIS Age-related vocal fold atrophy has become a significant voice disorder as the elderly population grows. However, several therapeutic challenges have limited attempts to improve voice quality. We reported that basic fibroblast growth factor (bFGF) stimulates fibroblasts to produce extracellular matrices such as hyaluronic acid in the lamina propria, leading to a regeneratio...

Variation in vocal effort represents one of the most challenging problems in maintaining speech system performance for coding, speech and speaker recognition. Changes in vocal effort (or mode) result in a fundamental change in speech production which is not simply a change in volume. This is the first study to collectively consider the five speech modes: whispered, soft, neutral, loud and shout...

Several vocal-tract models were reviewed, with special focus given to the sliding vocal-tract model [T. Arai, Acoust. Sci. Technol. 27(6), 384-388 (2006)]. All of the models have been shown to be excellent tools for teaching acoustics and speech science to elementary through university level students. The sliding three-tube model is based on Fant's three-tube model [G. Fant, Acoustic Theory of ...

PURPOSE To identify the immediate effects of voiced vibration and vocal fry exercises on healthy subjects by means of acoustic parameters and high-speed kymography. METHODS Thirty healthy subjects (18 women and 12 men, aged from 19 to 45 years old) participated in this study. The voices were recorded at the range of 44.100 samples/second, before and after of the vocal exercises. We developed ...

OBJECTIVES/HYPOTHESIS Severe vocal fold lesions such as vocal fold sulcus, scars, and atrophy induce a communication disorder due to severe hoarseness, but a treatment has not been established. Basic fibroblast growth factor (bFGF) therapies by either four-time repeated local injections or regenerative surgery for vocal fold scar and sulcus have previously been reported, and favorable outcomes ...