Testing And Approvals - MSA left/RIGHT Instruction Manual

USA
/ CAN / MX
HYGIENE KITS The cushions and inserts are replaceable. Always replace worn or damaged parts. Remove the
cushion by pulling it straight out (refer to illustration C1 at beginning of this instruction manual). Replace the old
cushion and insert with new ones from the hygiene kit (refer to illustration C2 at beginning of this instruction
manual). If the ear muff is used regularly, replace the hygiene kit at least twice a year to ensure that the noise
attenuation performance is maintained.
Note: Use only hygiene kits (cushions and inserts) from MSA.
left/RIGHT ™ Ear muff
LOW
MEDIUM
HIGH
WARRANTY
The product is guaranteed for one year from date of purchase against defects in material or workmanship. This
guarantee does not extend to damage caused by product misuse, abuse or unauthorized modifications. To make a
claim, please contact the source of purchase.

TESTING AND APPROVALS

The Noise Reduction Rating (NRR) is third-party certified in accordance with ANSI S3.19-1974. It also meets CSA
Class A.
Use Limitations
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 noise level and the NRR.
Example: The environmental noise level as measured at the ear is 92 dB(A). The NRR is (24) decibels (dB). The
level of noise entering the ear is approximately equal to 68dB(A) [92 – 24 dB(A)].
CAUTION!
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 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.
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.
To estimate the noise reduction capability of this hearing protector against impulsive noise, refer to the
Attenuation Data below or on the product package. If the frequency of the impulsive noise is 2000 hertz (Hz), for
example, the mean (average) reduction of noise attained by test subjects at that frequency was 32.1 decibels (dB).
Using the standard deviation of + 2.8 dB, the estimated noise reduction at 2000 Hz would range from 29.3 dB to
34.9 dB.
Refer to manufacturer of equipment producing the impulsive noise to determine the frequency.
WARNING!
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.
Order Kit #
10092878
10092879
10092880
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