Hearing protection OSHA checklist — noise you can't photograph, gaps you can
OSHA's noise standard works on two numbers: at an 8-hour average of 85 decibels the employer owes workers a hearing conservation program — monitoring, annual audiograms, free hearing protectors, and training — and at 90 decibels protection and feasible noise controls become mandatory. A camera can't measure a decibel, but the most common failure is fully visible: someone inside the noise of a saw, grinder, or compressor with bare ears while the earmuffs hang on a hook. OSHA Scan reads a photo of loud work and flags exposed ears, unused protectors, and stacked noise sources, referencing the OSHA standard each may relate to. It is an AI-assisted first pass — dosimetry and audiograms still decide compliance.
- Noise exposure actually measured
- Action level triggers the program
- Engineering and admin controls first
- Everyone in the zone, not just the operator
At what noise level does OSHA require hearing protection?
Two thresholds matter under 29 CFR 1910.95. At an 8-hour average of 85 decibels — the action level — employers must run a hearing conservation program: noise monitoring, annual audiograms, free hearing protectors offered, and training. At 90 decibels — the permissible exposure limit — protector use and feasible engineering or administrative controls become mandatory. A practical field cue: if you must raise your voice to talk at arm's length, the area likely deserves measurement.
Are earplugs or earmuffs better?
Neither is universally better — fit decides. A properly rolled and deeply inserted foam plug can outperform muffs; a shallowly inserted one can be nearly useless. Muffs are easier to verify at a glance and faster on and off for intermittent noise, but glasses arms and beards break their seal. OSHA requires offering a suitable variety so each worker gets a protector that seals for them, and very loud work — above roughly 100 decibels — typically calls for plugs and muffs together.
Can AI detect noise hazards from a photo?
Not the sound itself — no image measures decibels, and OSHA compliance ultimately rests on dosimetry and audiometric records. What the scan flags are the visible proxies: bare ears next to equipment that's clearly running, protectors hanging unused during the exposure, stacked noise sources, and unprotected bystanders in the noise zone. Those are the gaps a walkthrough misses because everyone acclimates to the noise they work in.