Introduction
Noise‑induced hearing loss (NIHL) is a frequent problem in
industrial settings, especially where a high noise level (more
than 85 dBA) is present. Noise has deleterious effects on health
and performance, including NIHL.[1] NIHL is the second most
common form of acquired hearing loss, after presbycusis.[2]
NIHL is permanent, irreversible, but preventable.[2]
The Hearing Conservation Program (HCP) of Occupational
Safety and Health Association (OSHA) mandates audiometric
assessment of workers who are exposed to noise levels equal
to or more than 85 dBA on an 8‑h time‑weighted average.[3]
Routine audiometric testing is performed periodically
among workers exposed to noise higher than 85 dB. OSHA