DETECTABLE PU FOAM EARPLUGS :
The PU foam earplugs is made from detectable PU foam and has following features :
Frequency HZ | 63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 |
Mean Attenuation DB | 32.7 | 36.2 | 37.6 | 36.9 | 37.7 | 37.6 | 47.9 | 44.6 |
Standard Deviation DB | 3.7 | 4.5 | 4.5 | 3 | 3.5 | 3.4 | 4.3 | 4.1 |
SNR= 37dB; H= 36dB; M= 35dB; L= 34dB |
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