For an 8-hour workday, hearing protection (like earplugs) is required for noise levels above 85 decibels (dBA), as this level is linked to increased risk of hearing loss over time

 For an 8-hour workday, hearing protection (like earplugs) is required for noise levels above 85 decibels (dBA), as this level is linked to increased risk of hearing loss over time. For every 3-decibel increase above 85 dBA, the allowable exposure time is cut in half, meaning even louder noises require protection for shorter durations. 

Noise Exposure Guidelines

85 dBA for 8 hours:

This is the point where the risk of hearing damage significantly increases, so hearing protection is recommended or required by regulations like NIOSH and OSHA. 

Above 85 dBA:

Exposure to noise levels greater than 85 dBA should be limited, and hearing protection is mandatory to prevent hearing loss. 

Example:

A noise level of 88 dBA would only be safe for about 4 hours, while 91 dBA is safe for only 2 hours. 

How Hearing Protection Works

Hearing protection, including earplugs, reduces the intensity of noise reaching your ears, lowering the risk of noise-induced hearing loss. 

The effectiveness of hearing protection is measured by its Noise Reduction Rating (NRR). 

Key Considerations

Employer Responsibility:

Employers are responsible for ensuring a safe working environment and providing necessary hearing protection when noise levels exceed safe limits. 

State Plans:

Some states operate their own OSHA-approved programs with their own, possibly stricter, requirements. 

Other Noise Controls:

Earplugs and earmuffs (Personal Protective Equipment) are the last line of defense, and employers should first try to eliminate or reduce noise through other controls.