LiBBra M Helmet Attachment (10221)
Description
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 comfortLiBBra M is best to be use on high noise volume place, such as office and hospital etc.
EN Standard 352-1:2002
| Freq.Hz | 125 | 250 | 500 | 1k | 2k | 4k | 8k | H | M | L | SNR |
| Mean Value | 23.6 | 22.2 | 29.2 | 34.4 | 31.1 | 36.6 | 38.9 | ||||
| 1 Std. Dev. | 2.6 | 2.7 | 3.6 | 6.1 | 4.1 | 3.8 | 4.6 | 29 | 27 | 23 | 29 |
| APV | 21.0 | 19.5 | 25.6 | 28.3 | 27.0 | 32.8 | 34.3 |
ANSI S3.19-1974
| Freq.Hz | 125 | 250 | 500 | 1k | 2k | 3k | 4k | 6k | 8k | NRR |
| Mean Attenuation | 19.4 | 20.2 | 29.3 | 37.8 | 36.5 | 35.5 | 35.6 | 33.1 | 35.6 | |
| 1 Std. Dev. | 3.5 | 2.2 | 2.7 | 3.9 | 4.3 | 4.5 | 2.8 | 2.5 | 3.7 | 24 |
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.
1
0.72 lbs. / 0.33 kg
195x95x190 mm / 7.6×3.7×7.5 inch
20
15.8 lbs. / 7.2 kg
420x495x400 mm / 16.5×19.5×15.7 inch
0.72 lbs. / 0.33 kg
195x95x190 mm / 7.6×3.7×7.5 inch
20
15.8 lbs. / 7.2 kg
420x495x400 mm / 16.5×19.5×15.7 inch
