Husqvarna X-COM R Operator's Manual page 227

HP310-2
Attenuation tested according to ANSI S3.19-1974
Frequen- 125
zy (Hz)
Mean at- 17.8
tenuation
dB(A)
Standard 2.9
deviation
dB(A)
NRR, dB 21
Head- 2.2
band
force, lbs
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.
Example:
1. The environmental noise level as measured at the
ear is 92 dBA.
2. The NRR is 21 decibels (dB).
3. The level of noise entering the ear is approximately
equal to 92 dB(A) - 21 dB(A).
CAUTION: For noise environments
dominated by frequencies below 500 Hz the
Battery
Type
3.7V Li-ion
DC
Materials
Part
Inner ear cup
Outer ear cup, left
Outer ear cup, right
Inserts
Sealing rings
579 - 005 - 05.07.2019
250 500 1000
17.8 24.6 27.9
2.6 2.9 3.1
Article number
Husqvarna: 594 95 62-01
Material
ABS
ABS
ABS+TPE
PUR
ABS+TPE
2000 3150 4000
35.6 42.1 43.8
3.3 3.4 3.7
C-weighted environmental noise level
should be used.
Improper fit of this device will reduce its effectiveness in
attenuating noise. Consult the enclosed instructions for
proper fit (in example this manual).
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.
Part
Headband
Helmet fork
Helmet fork spring
Screws
6300 8000
41.1 40.3
4.2 3.7
Material
POM+TPE
PA66GF30
Steel
Steel
227