OSHA & Noise Limits
What is OSHA’s Permissible Exposure Limit (PEL) for noise?
90 dBA over an 8-hour TWA
Is noise-induced hearing loss reversible?
No, it is permanent
What is the last line of defense in the hierarchy of controls?
Personal Protective Equipment (PPE)
What is a common early sign of hearing damage after work?
Ringing or buzzing in the ears (tinnitus)
What type of hearing protection typically provides the highest noise reduction when properly inserted?
Foam earplugs
What noise level triggers a Hearing Conservation Program?
85 dBA over an 8-hour TWA
What part of the ear is damaged by excessive noise?
Hair-like cells in the ear
When is dual hearing protection required?
When noise levels exceed about 100–105 dB
What happens to allowable exposure time when noise increases by 5 dB?
It is cut in half
Why is noise-induced hearing loss dangerous for workers?
It often occurs gradually and is not noticed until it’s too late
What is the first step when inserting foam earplugs?
Roll them into a small cylinder
What is OSHA’s exchange rate for noise exposure?
5 dB
Approximately how many workers exposed to high noise will develop permanent hearing loss
1 in 4
Who is responsible for providing hearing protection to employees?
The employer