Single hearing protection is required for which exposure ranges?

Single hearing protection is required for which exposure ranges?

• A. 85 to 104 dB(A)
• B. 140 to 165 dB(P)
• C. Both 85-104 dB(A) and 140-165 dB(P)
• D. Neither 85-104 dB(A) nor 140-165 dB(P)

Answer: (C)

The key idea is that protection is required whenever noise exposure crosses the levels that warrant hearing protection, for both steady and impulsive noise. For steady, continuous noise in the 85–104 dB(A) range, the exposure is high enough to trigger a requirement for hearing protection. A single hearing protection device (either an earplug or earmuff) provides enough attenuation on typical fits to bring exposure down to a safer level when worn correctly. For impulsive or peak noise in the 140–165 dB(P) range, protection is also required to guard against damaging sudden spikes. A single device is considered sufficient to reduce those peak levels with proper use, though fit and the specific protection rating matter. So, in both exposure ranges, wearing at least one hearing protection device is required, which is why both ranges are included in the correct choice.

The key idea is that protection is required whenever noise exposure crosses the levels that warrant hearing protection, for both steady and impulsive noise.

For steady, continuous noise in the 85–104 dB(A) range, the exposure is high enough to trigger a requirement for hearing protection. A single hearing protection device (either an earplug or earmuff) provides enough attenuation on typical fits to bring exposure down to a safer level when worn correctly.

For impulsive or peak noise in the 140–165 dB(P) range, protection is also required to guard against damaging sudden spikes. A single device is considered sufficient to reduce those peak levels with proper use, though fit and the specific protection rating matter.

So, in both exposure ranges, wearing at least one hearing protection device is required, which is why both ranges are included in the correct choice.