Aerodynamic and Acoustic Power in Infant Cry.

Objectives: Acoustic and aerodynamic powers in infant cry are not scaled downward with body size or vocal tract size. The objective here was to show that high lung pressures and impedance matching are used to produce power levels comparable to those in adults.

Study Design And Methodology: A computational model was used to obtain power distributions along the infant airway.

Comparative Study of Two Semi-Occluded Vocal Tract Protocols: A Randomized Clinical Trial.

Introduction: Semi-occluded vocal tract exercises (SOVTEs) are widely used as a therapeutic tool to create flow resistance in the upper airway. The current study was a randomized controlled clinical trial to establish the efficacy of two SOVTE protocols, flow-resistant tube (FRT) and Lessac-Madsen Resonant Voice Therapy (LMRVT). Exploratory investigations included a noninferiority analysis of FRT to the widely adopted therapy protocol (LMRVT), as well as examining the dosing required to improve acoustic measures and subjective ratings.

Deep Learning for Neuromuscular Control of Vocal Source for Voice Production.

A computational neuromuscular control system that generates lung pressure and three intrinsic laryngeal muscle activations (cricothyroid, thyroarytenoid, and lateral cricoarytenoid) to control the vocal source was developed. In the current study, , a biophysical computational model of the vocal system was used as the physical plant. In the , a three-mass vocal fold model was used to simulate self-sustained vocal fold oscillation.

Biomechanics of sound production in high-pitched classical singing.

Voice production of humans and most mammals is governed by the MyoElastic-AeroDynamic (MEAD) principle, where an air stream is modulated by self-sustained vocal fold oscillation to generate audible air pressure fluctuations. An alternative mechanism is found in ultrasonic vocalizations of rodents, which are established by an aeroacoustic (AA) phenomenon without vibration of laryngeal tissue. Previously, some authors argued that high-pitched human vocalization is also produced by the AA principle.