Hearing protection
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NTR-1 earmuff
The durable shell of earmuff is made out of high impact resistant ABS material. The extra soft car cushions provide maximum seal, comfort and complete hearing protection.It is suited for wearing in the high noisy workplace.
Attenuation values
| Frequency(Hz) | Measured attenuation(dB) | Standard Deviation(dB) | Assumed Protection Value(dB) |
| 125 | 14.6 | 3.5 | 11.1 |
| 250 | 14.8 | 3.4 | 11.4 |
| 500 | 22.6 | 3.6 | 19.0 |
| 1000 | 26.7 | 4.3 | 22.4 |
| 2000 | 34.8 | 3.3 | 31.5 |
| 4000 | 33.3 | 2.6 | 30.7 |
| 8000 | 37.4 | 4.3 | 33.1 |
Tested according to EN352-3:2002 H=32(dB), M=26(dB),L=19(dB), SNR=29(dB)
Testing data above is provided by UK 
