Magnum Ear hearing protection instrument, Руководство по эксплуатации

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The level of noise entering a person’s ear, when hearing protector is
worn as directed, is closely approximated by the difference between
the A-weighted environmental noise level and the NRR.
1 . The environmental noise level as measured at the ear 92 dBA .
2. The NRR is 24 dB (custom)/26 dB (BTE).
3 . The level of noise entering the ear is approximately equal to
[92 dB(A) – NRR] dB(A).
Caution: For noise environments dominated by frequencies below
500 Hz the C-weighted environmental noise levels should be used .
Improper fit of this device will reduce its effectiveness in attenuating
noise . Consult the enclosed instructions for proper fit .
Although hearing protectors can be recommended for protection
against the harmful effects of impulsive 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 .