MSA SUPREME 75301 Mode D'emploi page 35

75302 Supreme Pro
75302-X Supreme Pro X
75318 Supreme Pro WW
75328 Supreme Pro CC
76302 Supreme Pro
76328 Supreme Pro CC
Attenuation value explanation
F = Frequencies where attenuation value is measured.
Mf = Mean value,
Sf = Standard deviation,
APV (Mf–sf) = Assumed Protection Value
H = High frequency attenuation value (predicted noise level reduction for noise with LC–LA = –2 dB)
M = Medium frequency attenuation value (predicted noise level reduction for noise with LC–LA = +2
dB)
L = Low frequency attenuation value (predicted noise level reduction for noise with LC–LA = +10 dB)
SNR = Single Number Rating (the value which is subtracted from the measured C-weighed sound pres-
sure level, LC, in order to estimate the effective A-weighted sound pressure level inside the ear)
W = Gross weight of the hearing protector in gram, not including batteries
CRITERION LEVELS (table 4) Supreme Basic Line / Supreme Pro Line
Typical values in accordance with EN 352-4:2001, appendix A, with the volume set to maximum. Table
4 key:
H = High frequency sound pressure level (LC–LA = 1.2 dB)
M = Medium frequency sound pressure level (LC–LA = 2 dB)
L = Low frequency sound pressure level (LC–LA = 6 dB)
Additional information about the hearing protectors can be found on www.msa-sordin.com or from
MSA-SORDIN, Rörläggarvägen 8, SE-331 53 VÄRNAMO, Sweden.
THE FOLLOWING SUPPLEMENTARY INFORMATION APPLIES TO 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.
Headband
Headband
Headband
Headband
Neckband
Neckband
36
(Table 2)
(Table 2)
(Table 2)
(Table 2)
(Table 3)
(Table 3)