OSHA requires hearing protection when working in an area where the noise level is ___ dB or above.

OSHA requires hearing protection when working in an area where the noise level is ___ dB or above.

• A. 90
• B. 120
• C. 100
• D. 40

Answer: (A)

The main idea is how OSHA ties protection requirements to how loud the work area is. Noise exposure is measured in dB(A) and averaged over an 8-hour shift. When the level reaches 90 dB(A) or higher, employers must provide hearing protection and ensure its use. This threshold reflects the point at which protection is required to prevent noise-induced hearing loss. An 85 dB(A) action level triggers a hearing conservation program (planning, audiograms, training), but the specific mandate to provide and enforce hearing protection kicks in at 90 dB(A). The other options don’t match this regulatory trigger: 40 dB(A) is far below typical workplace noise, and 100 or 120 dB(A) are higher levels where protection is certainly necessary, but the standard for requiring PPE is 90 dB(A).

The main idea is how OSHA ties protection requirements to how loud the work area is. Noise exposure is measured in dB(A) and averaged over an 8-hour shift. When the level reaches 90 dB(A) or higher, employers must provide hearing protection and ensure its use. This threshold reflects the point at which protection is required to prevent noise-induced hearing loss. An 85 dB(A) action level triggers a hearing conservation program (planning, audiograms, training), but the specific mandate to provide and enforce hearing protection kicks in at 90 dB(A). The other options don’t match this regulatory trigger: 40 dB(A) is far below typical workplace noise, and 100 or 120 dB(A) are higher levels where protection is certainly necessary, but the standard for requiring PPE is 90 dB(A).