Tested according to EN 352-2:2020
1 Frequency Hz 63 125 250 500 1000 2000 4000 8000
2 Mean Attenuation dB 24,7 25,7 21,6 21,4 25,6 34,2 30,9 19,7
3 Standard Deviation dB 4,0 4,5 3,6 5,0 2,8 4,1 4,0 3,9
4 Assumed Protection in dB (APV) 20,7 21,2 18,0 16,4 22,8 30,1 26,9 15,8
SNR, H-, M- and L-values H = 23 M = 21 L = 19
SNR H M L
2 Mean Attenuation dB 25,2 25,9 24,5 22,8
3 Standard Deviation dB 3,4 3,3 3,4 3,7
5 Value dB 22 23 21 19
Tested according to ANSI 3.19-1974
1 Frequency Hz 125 250 500 1000 2000 3150 4000 6300 8000
2 Mean Attenuation dB 26,8 24,4 24,1 27,5 35,3 39,9 33,5 28,7 22,7
3 Standard Deviation dB 6,4 5,2 6,0 4,4 4,6 3,5 4,1 3,3 5,4
1. Fréquences, Frequenz. 2. Atténuation moyenne, Mittelwert der Schalldämmung. 3. Déviation standard,
Standardabweichung. 4. Protection eective, Angenommene Schutzwirkung. 5. Valeur dB, Wert dB.
Sizes (mm)
XS (8/9)
S (8/10)
M (8/11)
L (12/13)
Tested attenuation
SNR = 22 decibels (dB)
Mean SNR = 25 dB
Noise
Reduction
Rating
DECIBELS
Alpine Nederland B.V.
Utrecht, The Netherlands
Alpine Silence
THE RANGE OF NOISE REDUCTION RATINGS FOR EXISTING
HEARING PROTECTORS IS APPROXIMATELY 0 TO 30
(HIGHER NUMBERS DENOTE GREATER EFFECTIVENESS)
Federal law prohibits
removal of this label
prior to purchase
Label required by U.S.
EPA Regulation
40 CFR Part 211, Subpart B
16
WHEN USED AS DIRECTED
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Europalaan 40, 3526 KS
Utrecht, The Netherlands
alpine.eu v 024-01
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D-26389, Wilhelmshaven,
Germany
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dierences between SNR, NRR, and
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