Features:
- Feather weight earmuff with the measurement that is complying on the users comfort ability
- Sturdy stainless stell support that last longer than the widely used material in the market
- ABS grains are the main composition of cups and spring holder which leads to a good items timeline
- PVC leather are used for the cushion and headband, a quality that can last long
- A vibrant color code to identify easily the usage level of the earmuffs
- Adjustable length of the arms of the arch and cup swivel for greater security and comfort
LiBBra H is best to be use on high noise volume place, such as car buffing, traffic area and etc.
EN Standard 352-1:2002
| Freq.Hz |
125 |
250 |
500 |
1k |
2k |
4k |
8k |
H |
M |
L |
SNR |
| Mean Value |
21.4 |
24.4 |
35.0 |
37.9 |
34.4 |
37.4 |
39.2 |
|
|
|
|
| 1 Std. Dev. |
3.4 |
2.4 |
3.6 |
4.3 |
3.3 |
2.6 |
4.0 |
33 |
31 |
25 |
33 |
| APV |
18.0 |
22.0 |
31.4 |
33.6 |
34.8 |
35.2 |
|
|
|
|
|
ANSI S3.19-1974
| Freq.Hz |
125 |
250 |
500 |
1k |
2k |
3k |
4k |
6k |
8k |
NRR |
| Mean Attenuation |
22.9 |
25.0 |
33.3 |
36.6 |
36.5 |
37.0 |
38.8 |
38.0 |
37.8 |
|
| 1 Std. Dev. |
2.9 |
2.4 |
2.5 |
2.9 |
2.2 |
2.7 |
2.7 |
2.0 |
2.4 |
28 |
LiBBra offers 3 forms of earmuffs: Over the head earmuff, Helmet attachment an Foldable. Each form have levels (Low, Medium & High) that passed ANSI S3.19-1974 and EN Standard 352-1:2002.
Unit/box: 1
Box weight: 0.72 lbs. / 0.33 kg
Box dimensions: 195x95x190 mm / 7.6x3.7x7.5 inch
Box/case: 20
Case weight: 15.8 lbs. / 7.2 kg
Case dimensions: 420x495x400 mm / 16.5x19.5x15.7 inch
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