Hearos Ear Plugs Rock And Roll Series NRR 22

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Hearos Ear Plugs Rock And Roll Series NRR 22

Easy to Insert Trusted Since 1992 Reusable and Washable NRR 22 Free Case! Hear For Life Tested according to ANSI Specs S3.19-1974 The level of noise entering a persons ear, when hearing protector is worn as directed, is closely approximated by the difference between the A-weighted environmental noise level and the NRR. Example: The environmental noise level as measured at the ear is 92 decibels dB(A). The NRR is 22 decibels (dB). The level of the noise entering the ear is approximately 70 dB(A). Noise Reduction Rating 22 decibels (when used as directed)