Occupational hearing loss is hearing impairment resulting from prolonged or intense exposure to hazardous noise levels in the workplace. It primarily damages the hair cells in the inner ear's cochlea and can lead to permanent deficits. In occupational contexts this condition is often termed noise-induced hearing loss (NIHL).
Occupational hearing loss arises from two main patterns of exposure:
Acute acoustic trauma: sudden, intense sounds such as explosions or gunshots that can cause immediate, permanent damage.
Chronic exposure: repeated exposure to sounds exceeding safe thresholds over time, particularly levels above 85 decibels (dB) averaged over an 8-hour time-weighted average (TWA).
Loud noises cause vibrations that bend or destroy the sensory hair cells in the cochlea, disrupting signal transmission via the auditory nerve to the brain. This damage is typically irreversible.
This condition is common in industries with frequent hazardous noise exposure, including:
Construction
Manufacturing
Military service
According to CDC and OSHA data, occupational hearing loss affects an estimated 22 to 40 million U.S. workers annually.
In New York, occupational hearing loss is legally compensable through Workers' Compensation using the Schedule Loss of Use (SLU) awards.
