The level of noise entering a person's ear when a hearing protector is worn as directed is closely approximated by the difference between the A-weighted environmental noise level and the NRR. The environmental noise level as measured at the ear is 92dBA. The NRR of Quiet Time Comfort Foam Ear Plugs & Carrying Case is 33 decibels (dB). The level of noise entering the ear is approximately equal to 59 dBA.

Quiet Time Comfort Foam Ear Plugs & Carrying Case: Smooth, tapered design Soft, comfortable fit NRR 33 Excellent for races, music, airplanes and sleeping