Hyperacusis and Occupational Noise: What Employers Need to Know

Hyperacusis is an abnormal sensitivity to ordinary sounds that can occur after noise exposure. This guide covers what hyperacusis means for hearing conservation programs, OSHA recordability, HPD challenges, and employer response. According to CDC/NIOSH, approximately 22 million U.S. workers are exposed to hazardous occupational noise annually. OSHA 29 CFR 1910.95 governs the audiometric testing and recordkeeping that underlies all of these clinical topics.

Soundtrace audiometric testing is supervised by a licensed audiologist who reviews every audiogram — catching clinical findings that automated algorithms alone may miss and ensuring every compliance and clinical obligation is met.

What Is Hyperacusis?

Hyperacusis is a condition in which ordinary environmental sounds are perceived as uncomfortably or intolerably loud. A worker with hyperacusis may find sounds that most people find quiet or moderate (conversation, office equipment, ventilation systems) to be painful or distressing. Hyperacusis is distinct from tinnitus (phantom sounds) and from hearing loss (elevated thresholds). It can occur in workers with normal audiometric thresholds, elevated thresholds, or both.

Hyperacusis is associated with acoustic trauma and chronic noise exposure. It is more common in workers who have experienced sudden high-intensity noise events (explosions, gunfire, acoustic accidents) but can develop from cumulative noise exposure as well.

OSHA Audiometric Testing Doesn't Detect Hyperacusis

Standard OSHA 1910.95 audiometric testing measures hearing thresholds — the softest sounds a worker can detect. It does not measure loudness discomfort levels (LDLs) or assess hyperacusis. A worker with significant hyperacusis and normal hearing thresholds will pass the standard OSHA audiogram without any signal that a condition exists. Workers reporting sound sensitivity, ear pain, or discomfort from ordinary noise levels should be referred to the Professional Supervisor for clinical evaluation beyond the standard audiogram.

The HPD Challenge for Workers With Hyperacusis

Traditional HPDs present a paradox for workers with hyperacusis: the HPD reduces noise that causes discomfort, but workers with hyperacusis may have difficulty tolerating the occlusion effect (the sensation of wearing earplugs, which can exacerbate hyperacusis symptoms in some individuals). Level-dependent HPDs that provide protection against high noise levels while allowing lower-level sounds to pass at natural levels are often better tolerated by workers with hyperacusis than flat-blocking foam earplugs. HPD selection for hyperacusis workers should involve the PS or an audiologist familiar with the condition.

OSHA Recordability and WC for Hyperacusis

Hyperacusis is an occupational condition recordable under OSHA 1904 when it results in days away from work, restricted work activity, or medical treatment beyond first aid due to work-related noise exposure. WC claims for occupational hyperacusis are complex because the condition is not measured by standard audiometry and its severity is largely self-reported. Workers who document hyperacusis symptoms to their audiologist or physician during the period of occupational noise exposure create a contemporaneous clinical record that supports WC causal linkage.