Instructions

JBUDDIES PROTECT KIDS HEARING PROTECTION
FITTING INSTRUCTIONS
NOISE REDUCTION RATING (NRR)
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 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.
ATTENUATION DATA (ANSI S3.19-1974)
Place the earmuff on the head with the band resting on top of the head.
1
Pull out the earcups and place them over your ears so that the ear cushions fit snugly.
2
It is important that the cups fully enclose the ears and that the cushions exert equal
pressure around the ears.
3
Adjust the height of both earcups for comfort and a good seal. Do this by sliding the
earcup up or down while holding the headband in place.
4
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Product updates | How-to tips
FAQs & more
Example
1. The environmental noise level as measured at the ear is 92 dBa.
2. The NRR is 23 decibels (dB).
3. The level of noise entering the ear is approximately equal to 69 dB(a).
Caution
For noisy environments dominated by frequencies below 500 Hz, the C-weighted environmental noise level should be used.
Frequencies (Hz)
125 250 500 1000 2000 3150 4000 6300 8000
NRR
Mean Attenuation
(dB)
Standard Deviation
(dB)
13.9 25.7 23.7 33.7 32.7 36.7 38.6 40.2 40.7
23
2.0 2.8 2.8 1.7 2.4 2.4 2.6 2.9 2.4