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Custom Fit Hearing Protection Products
All Westone Custom Hearing Protection Device Noise Reduction Ratings have been tested and calculated according to EPA regulation 40 C.F.R Part 211 Subpart B.
NRR data acquired according to ANSI Standard S3.19-1974, Method for the Measurement of Real-Ear Protection of Hearing Protectors and Physical Atttenuation of Earmuffs, at an independent laboratory that is accredited by the National Voluntary Laboratory Accreditation Program of the National Institute of Standards and Technology.








