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*Xtremely high
*NRR 33
Xtremely High NRR 33
Noise Reduction Rating 33 Decibels (when used as directed).The range of noise reduction ratings for existing hearing protectors is approximately 0 to 30 (higher numbers denote greater effectiveness.
Tested according to ANSI Specs S3.19-1974The level of noise entering a person''s ear, when hearing protector is worn as directed, is closely approximated by the difference between the A-weighted environmental noise level and the NRR.
Attenuation Chart (ANSI S3.19-1974)Frequency125250500100020003150400063008000Mean Attenuation (dB)38.440.343.241.838.645.045.749.647.3Standard Deviation (dB)2.93.54.03.82.62.83.53.84.3
Example:
*The environmental noise level as measured at the ear is 92 decibels dB(A).
*The NRR is 33 decibels (dB).
*The level of noise entering the ear is approximately 59 dB(A).
Made in USA
Ear plugs must be inserted for optimum performance.
*With clean hands, firmly roll entire ear plug between thumb and fingers to form a thin tight cylinder.
*Using one hand, gently lift top of ear up to open ear canal.With other hand, insert rounded end of ear plug.
*With forefinger, hold ear plug in place until it expands to form a comfortable, snug fit.
Practice of insertion is recommended.Discard product after several uses or as soon as dirt or wax accumulates on ear plugs.© DAP World, Inc.