The purpose of this study was to estimate the vocal-tract length based on the distribution of sound pressure in the three-dimensional (3-D) vocal tract during the pronunciation of Japanese vowels. The 3-D shapes of a vocal tract and a dental crown were measured using Magnetic Resonance Imaging (MRI). A male subject was asked to produce Japanese vowels while wearing a dental crown plate that con...

Paradoxical Vocal Fold Movement Disorder is where the larynx exhibits paradoxical vocal cords closure during respiration, creating partial airway obstruction. Causes of vocal fold movement disorder are multifactorial, and patients describe tightness of throat, difficulty getting air in, have stridor, and do not respond to inhalers. We propose using transnasal laryngoscopy examination, which wil...

UNLABELLED Larynx is extremely sensitive to endocrinologic changes. Most vocal fold mucosa alterations are caused by changes in vocal fold liquid content and its epithelial changes. Estrogen and progesterone interfere and change this liquid content in the vocal folds. Our goal with the present paper is to study the presence of estrogen and progesterone receptors on vocal fold epithelium in 19 v...

Background: Tuberculosis of the larynx is a rare form of tuberculosis. Patients usually present with hoarseness or dysphagia and other nonspecific constitutional symptoms like fever or localized pain. In this study, we present a case of primary vocal cord lesion with tuberculosis. Case presentation: A 72 year old man presented with hoarseness of voice, low grade fever, and night sweating with i...

All non-human primates communicate with conspecifics using vocalizations, a system involving both the production and perception of species-specific vocal signals. Much of the work on the neural basis of primate vocal communication in cortex has focused on the sensory processing of vocalizations, while relatively little data are available for vocal production. Earlier physiological studies in sq...

PURPOSE To relate vocal fold structure and kinematics to 2 acoustic measures: cepstral peak prominence (CPP) and the amplitude of the first harmonic relative to the second (H1-H2). METHOD The authors used a computational, kinematic model of the medial surfaces of the vocal folds to specify features of vocal fold structure and vibration in a manner consistent with breathy voice. Four model par...

BACKGROUND Vocal tremor may be associated with cyclic oscillations in the pulmonary, laryngeal, velopharyngeal, or oral regions. OBJECTIVES This study aimed to correlate the overall severity of vocal tremor with the distribution and severity of tremor in structures involved. METHODS Endoscopic and clinical examinations were completed on 20 adults with vocal tremor and two age-matched contro...

Real-time magnetic resonance imaging (rtMRI) provides information about the dynamic shaping of the vocal tract during speech production.1 We develop a dynamical system in the framework of Task Dynamics2 which controls vocal tract constrictions and induces deformation of the air-tissue boundary. The system parameterizes the air-tissue boundary through factor analysis of rtMRI videos and characte...

Vocal production requires active control of the respiratory system, larynx and vocal tract. Vocal sounds in mammals are produced by flow-induced vocal fold oscillation, which requires vocal fold tissue that can sustain the mechanical stress during phonation. Our understanding of the relationship between morphology and vocal function of vocal folds is very limited. Here we tested the hypothesis ...