EARPLUG MEASUREMENT DATA
POLY-SHEER II |
Center Frequency in Hz |
Mean
Attenuation in dB |
Group
Attenuation in dB |
Standard
Deviation in dB |
| 125 |
33.2 |
67.7 |
3.7 |
| 250 |
34.5 |
3.8 |
| 500 |
36.6 |
194.2 |
4.3 |
| 1000 |
34.6 |
3.6 |
| 2000 |
36.5 |
3.7 |
| 3150 |
42.4 |
3.8 |
| 4000 |
44.1 |
4.3 |
| 6300 |
43.9 |
88.8 |
4.8 |
| 8000 |
44.9 |
3.8 |
| NRR = 28 dB |
|
Use this
Laboratory-derived data for comparison purposes only. The amount of protection
afforded in field use is often significantly lower depending on how the protectors are
fitted and worn. |
| |
