Technical Specifications | 39 38 | Technical Specifications
Hearing Protection Information
This SoundGear device has a noise reduction
rating (NRR) of 22 dB.
This is a standardized estimation of how much
noise is attenuated. Actual attenuation varies
depending on many factors, such as impulse vs.
continuous noise, overall sound pressure level,
sound frequencies, volume and amplification
settings, etc. For more information, see
soundgear.com/guide.
Total Frequency
(Hz)
Mean Attenuation
(dB)
Standard
Deviation (dB)
125 7.8 4.2
250 23.8 3.8
500 26.9 4.3
1000 29.0 3.7
2000 34.6 3.2
3150 39.5 4.5
4000 41.9 4.7
6300 41.7 3.3
8000 40.7 3.8
Attenuation Data
Measurements were made according to
American National Standards Institute
Specifications ANSI S3. 19-1974.
IPIL (Impulse Peak Insertion Loss)
dB Peak 132 150
168
Normal 18.0 35.5
34.4
Max
Compression
18.1 35.6
34.6
High Freq.
Boost
17.5 36.2 34.6
Mute 33.9 35.9
34.4
dB attenuation as measured according to ANSI S12.42-2010
on GRAS 45CB test fixture.
Note that the earplugs were fitted to a
test fixture with cylindrical ear canals. The
attenuation provided to humans may vary. This
data is in accordance with Canadian standard
CZ942-14.
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