TPR EAR PLUGS :
The TPR ear plugs has following features:
Frequency HZ | 63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 |
Mean Attenuation DB | 23.4 | 25.3 | 23.7 | 23.4 | 25 | 27.9 | 35.3 | 39.9 |
Standard Deviation DB | 3.8 | 5 | 6.3 | 6.7 | 5.5 | 4.3 | 5.9 | 7.7 |
SNR= 23dB; H= 25dB; M= 20dB; L= 18dB |
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