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we are the noiseproof earmuff manufactory ,make kinds of noise reduction earmuffs
Cutoff earu muff permits verbal communication and clear hearing of important warning signals.
Electronic output is limited when sounds over 82dB
Enlarge weak sounds up to 12dB
Adjustable handband can be used both in work such as cutting and leasure time like shooting or hunting
Electronic Noise Blocking Earmuff
Sound active compression (SAC) reduces sounds to safe levels(≈85dB)Amplification 8 times to detect the ambient sounds if lower than 70dB1/8in(3.5mm) input jack/plug for portable audio devices such as MP4,Ipod etc.High fidelity stereo soundAdjustable headbandLight weightFoldable headband, easy for storageSoft padded ear cushionIndependent electronic circuit on both cups Powered by 2x1.5v AAA batteries on each cup over 300 hours lifetime(alkaline)Idea for shooter, hunter and worker involved in noisy surroundingATTENUATION DATA , NRR
Overall A Weighted Level=81
OSHA Adjusted NRR=21
Frequency HZ | 125 | 250 | 500 | 1000 | 2000 | 3150 | 4000 | 6300 | 8000 |
Mean Attenuation(dB). | 1.0 | 15.5 | 22.2 | 24.6 | 33.7 | 32.4 | 29 | 39 | 39.3 |
Standard Deviation(dB) | 4.3 | 2.5 | 2.6 | 2.6 | 3.7 | 2.9 | 1.9 | 3.6 | 3.3 |
noiseproof earmuff manufactory hearing protection,ear protector