Phonation is defined as a laryngeal motor behavior used for speech production, which involves a highly specialized coordination of laryngeal and respiratory neuromuscular control. During speech, brief periods of vocal fold vibration for vowels are interspersed by voiced and unvoiced consonants, glottal stops and glottal fricatives (/h/). It remains unknown whether laryngeal/respiratory coordina...

The flow-induced vibrations of a single-layer vocal fold model were investigated as a function of vocal fold stiffness, and subglottal and supraglottal acoustic loading. Previously, it was reported that the single-layer vocal fold model failed to vibrate when short, clinically-relevant tracheal tubes were used. Moreover, it was reported that the model had a propensity to be acoustically driven,...

OBJECTIVES/HYPOTHESIS To determine whether radiographic measures of hyoid position, laryngeal position, and hyolaryngeal space during phonation were different for people with primary muscle tension dysphonia (MTD) as compared to control participants without voice disorders. STUDY DESIGN Prospective, quasi-experimental research design. METHODS Twenty participants, 10 with primary MTD and 10 ...

We have studied the effects of phonation and posture on the Mallampati classification of view of the pharyngeal structures. Differences between observers were allowed for by the experimental design and log-linear modelling. Sixty-four patients were assessed on the ward, sitting upright, with and without phonation, by each of two observers. Another 64 patients were assessed without phonation, bu...

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 ...

This study examines tone and phonation in White Hmong, a language with seven tones (traditionally described as: high, mid, low, high-falling, mid-rising, low-falling, and mid-low) and three phonations (low-falling tone is creaky, mid-low tone is breathy and the remaining tones are modal). Thirty-two speakers were recorded producing words with all seven tones; audio and electroglottographic reco...

This article describes experiments carried out in order to gain a deeper understanding of the mechanisms underlying variation of vocal loudness in singers. Ten singers, two of whom are famous professional opera tenor soloists, phonated at different pitches and different loudnesses. Their voice source characteristics were analyzed by inverse filtering the oral airflow signal. It was found that t...

This study compares the phonetics of phonation categories within and across four languages: Gujarati (modal, breathy), White Hmong (modal, breathy, creaky), Jalapa Mazatec (modal, breathy, creaky), and Southern Yi (tense, lax). In addition to acoustic measures in all four languages, electroglottographic measures were also compared for Gujarati, Hmong, and Yi. Several measures distinguished phon...

OBJECTIVES This study aimed (1) to investigate music theory teachers' professional and extra-professional vocal loading and background noise exposure, (2) to determine the correlation between vocal loading and background noise, and (3) to determine the correlation between vocal loading and self-evaluation data. METHODS Using voice dosimetry, 13 music theory teachers were monitored for one wor...