Connections between voice ergonomic risk factors and voice symptoms, voice handicap, and respiratory tract diseases.

Objectives: The aim of the study was to investigate the connections between voice ergonomic risk factors found in classrooms and voice-related problems in teachers.

Methods: Voice ergonomic assessment was performed in 39 classrooms in 14 elementary schools by means of a Voice Ergonomic Assessment in Work Environment--Handbook and Checklist. The voice ergonomic risk factors assessed included working culture, noise, indoor air quality, working posture, stress, and access to a sound amplifier.