APPROXIMATELY one third of the labor force in industrialized societies relies on voice as their primary work tool.
1 Occupational voice disorders might be the result of the repetitive movement or "collision" of the vocal folds.
1 Vocal attrition can be described as "the ‘wear and tear' of the vocal mechanism and the overall reduction in vocal capabilities associated with acute or chronic abuse of the phonatory system."
2(p130) Recent studies have shown an association between voice problems and vocally demanding jobs such as teaching,
3-6 singing,
7-9 and aerobics instruction.
10,11