FT-FM-9001B-E high noise canceling earmuffs passive noise reduction design
Product Advantage:
- Helmet mounted earmuff are part of the centurion connect range.
- It is compatible with Miner, Roofer, Linesman and Vulcan Helmet.
- Good inner space for ear.
- With CE, ANIS, AS/NZS standard.
Direction of Use
Pull the cups outward and position the hearing protector over your ears so that the cushions fully enclose the ears and seal tightly against the head.
Insert the headband into the hard hat’s slots until they snap into place. When in use, the wire bands must be pushed inward until you hear a “click” on both sides, indication a shift from “stand-by” to “usage” position. Make sure the cups and wire bands are not in contact with the inner lining or the edge of the hard hat when in the “usage” position, otherwise this may lead to leakage.
Note: The cups can be placed in three positions: Usage position, Stand-by position, Storage position
Important: For best protection ear cushions should seal firmly against the head. Anything that interferes with the seal such as long hair(pull back to the extent possible), thick or poorly fitting eyeglass temples, pencils, or caps, will lessen the protection. Do not bend and reshape the headband as this will cause a loose fit and sound leakage.
Care and cleaning instructions
- Clean the outside of the earmuff regularly with soap and lukewarm water. Do not immerse in water.
- Do not store the earmuff in temperatures above 130°F(+55°C), for example behind a windshield or window.
- This product may be impaired by certain chemical substances.
- Earmuffs must be regularly inspected for cracked or worn parts and replaced as needed. Typical life for foam cushions is 6 months.
- This product contains metallic components that may increase electrical hazards.
| FT-FM-9001B-E |
| Frequency(h2) |
63 |
125 |
500 |
1000 |
2000 |
4000 |
8000 |
| Mean attenuation |
24.6 |
15.2 |
27.7 |
34.7 |
32.8 |
35.5 |
39.0 |
| Standard deviation |
3.6 |
3.2 |
2.9 |
2.2 |
3.3 |
3.7 |
3.9 |
| Assumed protection |
21.0 |
16.1 |
24.8 |
32.5 |
29.6 |
31.7 |
35.1 |
| SNR=29dB H=32dB M=27dB L=19dB |
