Environmental and Ergonomic Hazards
Noise Hazards
Noise, or unwanted sound, is one of the most widespread occupational health problems. Exposure to high levels of noise causes hearing loss and may also cause other harmful health effects.
The extent of damage primarily depends on the intensity of the noise and the duration of the exposure. Exposure to high levels of noise is cumulative and can cause permanent hearing loss.
Neither surgery nor medicine can correct this type of hearing loss, although hearing aids may help. Construction sites have many noisy operations and can be a significant source of noise exposure.
When a Hearing Conservation Program is Required
According to OSHA 1926.52, Table D-2, Permissible Noise Exposures , if sound levels exceed permissible exposures, the employer must administer a continuing, effective hearing conservation program. For instance, in construction work, Table D-2 limits employee noise exposure to 90 dBA for an 8-hour duration. 90 dBA/8 hours is the key federal OSHA threshold.
When Hearing Protection is Required
OSHA also requires feasible engineering or administrative controls when exposures exceed Table D-2 limits, and OSHA 1926.101 requires ear protective devices when it is not feasible to reduce exposure to the permissible levels in Table D-2. Ear protective devices inserted in the ear must be fitted or determined individually by competent persons.
Knowledge Check Choose the best answer for the question.
2-1. Under OSHA's construction noise standard, when is an effective hearing conservation program required?
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