anti-noise earmuff with safety helmet type ear muff to reduce noise and sound insulation does not include cover | Безопасность и

anti-noise earmuff with safety helmet type ear muff to reduce noise and sound insulation does not include cover | Безопасность и

Model 0505 helmet earmuff

The cup position can be freely adjusted

Earmuffs can be pulled up and placed on safety hats, suitable for a variety of safety hats

Name: Yile Brand with Safety Helmet Earmuff

Model: 0505

Material: ABS

Packing: 10/6 boxes/60 boxes/boxes

Easy to wear

Work & nbsp;Great Comfort and Protective Effect AFC Technology Design New Technology Improves Firm Metal Ring Headband Structure, Top and Outside of Headband Exquisite Canvas Cloth, Inside, Leather Wear Resistant, Adjustable Length According to Face Size. Suitable for special and demanding environment.

Excellent & nbsp; Point:Soft and comfortable, with sponge headband, long-term wear of more comfortable and solid metal hoop structure, can withstand the test of high environmental requirements of air control technology (hereinafter on air control technology) provides excellent sound attenuation effect unit type earmuff pad replacement fast and convenient, multi-voiceHeadband L2  can be selected for sound attenuation value and noise reduction is 29 decibels. Soft and comfortable, with sponge headband, long-term wear more comfortable, can adjust the height of flexibility, while ensuring that in use can be well fixed, durable headband, twist no problem. Headband adjustable.According to the size of a person's face, the length can be adjusted to suit both men and women.

Wood   Material:Inside the headband, the leather is wear-resistant, and the sponge inside is soft and comfortable. From outside to inside, the earmuffs are: plastic shell, sound insulation material, sound absorption sponge, soft round cushion of cortex auricle.

Heavy-nbsp; Quantity:Only 260 G & nbsp; & nbsp; & nbsp; & nbsp; & nbsp;

        DB is the unit of sound pressure level and is recorded as db. Used to indicate the size of the sound. One decibel is about the sound one has just felt. The suitable living environment should not exceed 45 decibels and should not be lower than 15 decibels.

According to ordinary people's hearing:
0-20 decibels are quiet and almost imperceptible.
20-40 decibels is quiet, like a whisper.
40-60 decibels general, ordinary indoor conversation
60-70 decibels is noisy and nerve-damaging.
70-90 decibels are noisy and nerve cells are damaged.
90-100 decibels increased noise and impaired hearing.
100-120 decibels unbearable, temporarily deaf after staying for one minute