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The following supplementary information applies to Sordin Supreme, only in USA/CAN:
Tested according to ANSI Specifications, ANSI S3.19-1974
Information required by E.P.A:
The level of noise entering a person's ear, when hearing protection is worn as directed, is closely
approximated by the difference between the A-weighted environmental level and the NNR. Example:
The environmental noise level at the ear is 92 dB(A). The NNR is 23 decibels (dB). The level of noise
entering the ear is approximately equal to 69 dB(A).
CAUTION:
For noise environments dominated by frequencies below 500 Hz, the C-weighted environmental
noise level should be used. Improper fit of this device will reduce its effectiveness in attenuating
noise. Although hearing protections can be recommended for protection against harmful effect of
impulse noise, the Noise reduction Rating (NRR) is based on the attenuation of continuous noise and
may not be an accurate indicator of the protection attainable against impulsive noise, such as gunfire.
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#75302
ATTENUATION DATA – Sordin Supreme
Frequency (Hz)
125
250
500
1000
2000
3150
4000
6300
8000
NRR
Mean (dB)
11,1
16,5
23,1
25,0
29,5
33,9
35,5
38,3
38,7
18
Standard deviation (dB) 2,6
3,0
3,2
2,8
4,1
3,1
3,6
4,0
3,2
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