8
NOISE REDUCTION RATING (NRR)
The NRR for the AESEB1S SMART SENSE Situational Awareness
Bluetooth
®
Earbuds is 26dB. It is tested and in accordance with ANSI
S3.19-1974. To ensure adequate hearing protection, the provided memory
foam tips must be used with the Bluetooth
®
Jobsite Earbuds.
ANSI S3.19-1974 TESTING
Frequency
(Hz)
125 250 500 1000 2000 3150 4000 6300 8000 NRR
Mean
Attenuation
29.7 29.3 26.3 27.3 33.8 37.5 34.5 40.1 40.9
26
Standard
Deviation
3.6 2.8 3.5 3.3 2.9 2.3 2.2 3.6 2.5
The level of noise entering a person’s ear when the hearing protector is
worn as directed, is closely approximated by the difference between the
A-Weighted environmental noise level and the Noise Reduction Rating
(NRR).
EXAMPLE:
• The environmental noise level as measured at the ear is 93dB(A).
• The NRR is 26dB.
• The level of noise entering the ear is approximately equal to 67dB(A).
ENGLISH
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