OSHA's approach to noise hazard management follows the standard industrial hygiene hierarchy of controls. Engineering controls — physical modifications to equipment, processes, or the work environment that reduce noise at its source or along its transmission path — are the preferred intervention. Examples include replacing mechanical components with quieter alternatives, installing dampening materials, or enclosing noise-generating equipment.
OSHA’s approach to noise hazard management follows the standard industrial hygiene hierarchy of controls. Engineering controls — physical modifications to equipment, processes, or the work environment that reduce noise at its source or along its transmission path — are the preferred intervention. Examples include replacing mechanical components with quieter alternatives, installing dampening materials, or enclosing noise-generating equipment. Administrative controls — schedule and procedural modifications such as job rotation and limiting time in high-noise areas — are secondary and depend on sustained management enforcement. Hearing protection devices are the control of last resort: they protect the individual worker but do not reduce the hazard. OSHA requires that engineering and administrative controls be implemented when exposures exceed the PEL (90 dBA TWA) and those controls are feasible, even when HPDs are also in use. This hierarchy matters for Hearing Conservation Program design because a program built around HPDs alone — without investigating control options — does not meet OSHA’s intent and leaves underlying hazards unaddressed.
