The Quick Rule

If you have to raise your voice to talk to someone three feet away, you're probably over 85 decibels — OSHA's action level. That's your trigger to act.

OSHA action level

Once any worker spends 8 hours averaging 85 dB or more, you're required to have a full hearing conservation program. Period.

What Each Risk Level Means

•        Green (under 85 dB): Safe. No protection required.

•        Yellow (85–95 dB): Action required. Hearing conservation program kicks in. NRR 22+ recommended.

•        Orange (95–105 dB): High risk. Step up to NRR 27+ and consider dual protection at the upper end.

•        Red (105+ dB): Dual protection (plugs + muffs) required. Limit exposure time as well.

Don't Trust the Chart Alone

These are typical ranges, not your numbers. Actual decibel levels change with equipment, layout, and time of day. The only way to know what your workplace is really doing is a proper noise survey with a calibrated meter.

 

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