For noise environments dominated by frequencies below 500 Hz the C-weighted
environmental noise level should be used.
The EPA has selected the NRR as a measure of a hearing protector's noise reducing
capabilities. There is no warranty as to the suitability of the NRR as a measure of the actual
workplace protection since such protection is highly dependent on user training, motivation,
and utilization. Refer to the above instructions for proper fi t.
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 gunfi re.
The noise reduction capability of this hearing protector against impulsive noise may be
estimated by referring to the attenuation performance of the hearing protector at the frequency
of the impulsive noise exposure as provided in the attenuation data on the package.
An appropriate hearing conservation program must be utilized that includes adequate
monitoring and audiometric testing to ensure effective hearing protection. Improper use
of the hearing protector or failure to conduct adequate monitoring and testing can result in
hearing loss or other serious personal injury.
ATTENUATION DATA – MSA Supreme Pro Communication Headset
Supreme Pro Communication Headset (Headband) NRR = 21dB, CSA class B
ANSI S3.19-1974 Data (Overhead)
Frequency (Hz)
NRR Mean (dB)
Standard Deviation (dB)
ATTENUATION DATA – MSA Supreme Pro Communication Headset
Supreme Pro Communication Headset (Neckband) NRR = 19dB
ANSI S3.19-1974 Data
Frequency (Hz)
NRR Mean (dB)
Standard Deviation (dB)
The following supplementary information applies only to Supreme Pro: Audio Input (AUX)
Supreme Pro and Basic AUX have on input, a 3.5mm socket, for connecting an external audio
source, e.g. communication radio, hunting radio, mobile phone etc. We recommend that you
connect the angled jack plug to the cup as this gives the most secure connection and is least
obtrusive. Refer to the operating instructions for the external audio equipment to ensure that
it is correctly connected.
P/N 10081681
!
CAUTION
!
WARNING
125
250
500
15.1 18.8 25.4
2.8
2.1
2.1
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14.4 18.1 22.3
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2.9
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36.8
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4.5