MSA V-Gard HP HIGH Mode D'emploi page 113

ATTENUATION DATA (Table 1)
The sound attenuation values for the ear-muffs are measured in accordance with AS/NZ S1270:2002. For further
information, refer to Table 1.
Key:
f = Frequencies at which attenuation is measured, Mf = Mean value, sf = Standard deviation, APV (Mf–sf) = Assumed
Protection Value
SLC = SOUND LEVEL CONVERSION ration defined as the difference between the C weighted sound level of the
80
environment in which the HPD is worn and the A weighted sound level reaching the wearer's ears. The SLC value
includes a mean minus one standard deviation correction to ensure that the stated degree of noise reduction is obtained
on 80% of occasions. In the SLC
W = Weight
EAR-MUFF AND HELMET COMBINATIONS (Table 2)
For further information, refer to Table 2. The table shows which ear-muff adaptor to use for each helmet.
Key:
Manufacturer/model = Helmet brand; Adapter Type No = A number found on the backside of the ear-muff adaptor,
see pic. H
HYGIENE KITS (Table 3)
Key:
Description = Hygiene kit; Product Number = Item part number
HELMET ADAPTER KITS (Table 4)
Key:
Description = Helmet adapter kit; Product Number = Item part number
PRODUCT MODELS (Table 5)
Key:
Description = MSA ear-muffs model; Product Number = Item part number
TABLE 1 - ATTENUATION
High
Weight: 377 g
Attenuation - AS/NZS 1270:2002
f (Hz)
Mf (dB)
sf (dB)
APV (dB)
* V-Gard, HP, HIGH in combination with MSA V-Gard Helmet. For other helmets, please contact your distributor.
Clamping force in accordance with clause 3: 10.4 N
Medium
Weight: 312 g
Attenuation - AS/NZS 1270:2002
f (Hz)
Mf (dB)
sf (dB)
APV (dB)
* V-Gard, HP, MEDIUM in combination with MSA V-Gard Helmet. For other helmets, please contact your distributor.
Clamping force in accordance with clause 3: 10.4 N
, the 80 indicates the percentage protection rate.
80
125 250 500
21 21.9 34.4
5 3.4 4.4
16 18.5 30
125 250 500
15.6 17.3 28.1
6.2 5.5 5.4
9.4 11.8 22.7
1000 2000 4000
41 37.2 38.3
3.4 4.9 5.4
37.6 32.3 32.9
1000 2000 4000
36.6 36.5 38.0
5.3 3.4 7.9
31.3 33.1 30.1
Class 5*
8000
36.3
5.3
31
Class 5*
8000
35.7
8.1
27.6
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