Does Portable Voice Amplification Improve Vocal Outcomes in Elementary School Teachers? Evidence From Aerodynamic, Acoustic, and Self-Reported Measures.
PURPOSE The present study aimed at evaluating the impact of a voice amplification system plus vocal hygiene on aerodynamic, acoustic, and self-reported outcomes in elementary school teachers with and without voice problems. METHOD A total of 217 elementary school teachers were initially recruited: 108 normal-voiced p...