Electronic Earmuffs
Negotiable /Piece
Min.Order:500 Pieces
Suzhou Oulijia Electronic Co., Ltd.
Electronic earmuffs
1. Various Colors available |
2. SNR=25dB |
3. CE: EN 352-4 |
4. Size:15*10*13cm |
5. Wieght:0.220kg |
6. Amplify low-level sound. |
7. Automatically shuts off noise above 85 decibels (DB) |
8. Adjustable headband. |
9. Two independent volume controls |
10.Two wind-resistant, high-frequency, microphones. |
11.Uses 4xAAA batteries (not included) |
12.Easy to Change the batteries. |
Instruction For Use
1 Extend headband to maximum open position and place the cups over the ears with the headband passing over the head.
2 Settle the head band in position on the head while adjusting the height of the ear cups up or down until they feel comfortable and the headband rests on the top of the head to support the muffs.
3 Make sure that the headband is evenly adjusted, left to right. The ear cushion should be a snug fit against the head.
4 Make sure to get as little air as possible between the ear cushions and your head. Muffs should be cleaned regulary with soap and water
CAUTION.
For noise environment dominated by frequencies below 500Hz, the C-weighted environmental noise level should be
used. Improper fit of this device will reduce its effectiveness in attenuating noise. Although hearing protection can be recommended for protection against the harmful effects of impulse noise, the Noise Reduction Rating is based on the
attenuation of continuousnoise
CAUTION.
For noise environment dominated by frequencies below 500Hz, the C-weighted environmental noise level should be
used. Improper fit of this device will reduce its effectiveness in attenuating noise. Although hearing protection can be recommended
for protection against the harmful effects of impulse noise, the Noise Reduction Rating is based on the attenuation of continuousnoise
H | M | L | SNR |
30 | 23 | 15 | 25dB |
Frequency HZ | 125 | 250 | 500 | 1000 | 2000 | 3150 | 8000 | 6300 | 80000 |
Mean att. | 12.3 | 14.8 | 25.0 | 33.8 | 30.4 | 34.9 | 36.1 | 39.0 | 36.1 |
Std dev. | 2.9 | 2.8 | 3.5 | 3.1 | 3.6 | 3.0 | 4.9 | 4.1 | 4.9 |