79 Hearing Protection EN standards Tests and standards All uvex hearing protection products comply with the CE standard and have been tested in accordance with the applicable European standards in line with current EU legislation. Continuous quality assurance with ISO 9001/2015,I ISO 14001:2015 ISO 45001. Applicable DIN EN norms are: • EN 352: Part 1 Earmuffs • EN 352: Part 2 Ear plugs • EN 352: Part 3 Earmuffs attached to a safety helmet • EN 352: Part 4 Level-dependent hearing protection earmuffs • EN 352: Part 6 Earmuffs with communication equipment • EN 352: Part 8 Audio earmuffs for entertainment Abbreviations for protection values with explanations SNR Single Number Rating/average protection capacity f/Hz Frequency given as a unit of Hertz (MA) Mean Attenuation Mean attenuation (SD) Standard Deviation (APV) Assumed Protection Value Assumed protection value HML value H: Attenuation value at high frequencies M: Attenuation value at medium frequencies L: Attenuation value at low frequencies
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