A leading cause of job-related illness in North America is

Importance. Occupational hearing loss is the most common occupational disease in the United States: it is so common that it is often accepted as a normal consequence of employment. More than 30 million workers are exposed to hazardous noise, and an additional 9 million are at risk from other ototraumatic agents.

leaning back,   no eye contact,   fidgeting in the seat