Shanghai Sunland Industrial Co., Ltd is the top manufacturer of Personal Protect Equipment in China, with 20 years’experience. We are the Chinese government appointed manufacturer for government power,personal protection equipment , medical instruments,construction industry, etc. All the products get the CE, ANSI and related Industry Certificates. All our safety helmets use the top-quality raw material without any recycling material.
Safety helmet of Shaanxi construction No.5 Construction Group
We provide exclusive customization of the products logo, using advanced printing technology and technology, not suitable for fading, solid and firm, scratch-proof and anti-smashing, and suitable for various scenes such as construction, mining, warehouse, inspection, etc. Our goal is to satisfy your needs. Demand, do your best.
Professional team work and production line which can make nice quality in short time.
The professional team provides 24 * 7 after-sales service for you, which can help you solve any problems
These ,ear muffs can reduce, up to 37 ,decibels,, making them the perfect addition to every hazardous environment. They are also easily cleaned due to the waterproof material that covers them, and they are definitely among the best ,ear muffs, for noise reduction.
It is important to understand that while NRR is measured in terms of ,decibels,, the device you use to ,reduce, exposure will not ,reduce, sound levels by the exact ,decibels, that are related with its NRR. This means that if you are firing a rifle that produces 140 ,dB, and the hearing protection that you have on has an NRR 33 ,dB,, the level of noise exposure is not reduced to 103 ,dB,.
How many decibels, do ear plugs ,reduce,? Ear plugs are as effective as ,earmuffs, for hearing protection with equivalent ,decibel, ratings. An example of this are ear plugs by Howard Leight which have a ,decibel, rating of 32 which is one of highest NRR ear plugs.
At 140 ,decibels,, immediate nerve damage ,can, occur. Firearms, firecrackers, and jet engines taking off are all louder than 140 ,dB,. If you find yourself near any of these without hearing protection, use your fingers and plug your ears! And at the same time, move away from the noise — even a few extra feet ,can reduce, the loudness significantly.
How to Choose Shooting ,Earmuffs,: Selection Guide. Did you know the sound of gunfire is the most hazardous non-occupational noise that Americans are exposed to? It's possible that a single shot with an unprotected ear ,can, lead to immediate and permanent hearing loss, often accompanied by tinnitus (ringing, hissing, or humming in the ears).
Whereas most ,earmuffs can reduce, around 20-25 ,dB, from the environment, this one ,can, go as far as 30 ,dB, – which is pretty convenient if you are working in extremely noisy surroundings. Considering the price that you pay for them, these ,ear muffs, have some fairly good specifications.
For example glasses with thin temples reduced NRR(Noise Reduction Ratings) by 2 ,dB, while the thicker temples ,can reduce, the NRR by 11 ,dB,. In that case, earplugs are a far better option. If you are wearing ,earmuffs, make sure no other things cover your ears or the surrounding area that ,can, interfere with the headband, because wearing something like even a baseball cap will ,reduce, the NRR by 5 ,dB,.
Ear muffs can, vary with respect to the material and depth of the dome, and the force of the headband. The deeper and heavier the dome, the greater the low-frequency attenuation provided by the protector. The headband must fit tightly enough to maintain a proper seal, yet not be too tight for comfort.
Prior to placement on the head, hair should be carefully pulled back and away from the cushions. Placing ,earmuffs, over obstructing hair or safety glasses with thick frames may ,reduce, the ,earmuff, attenuation by 5-10 ,dB,. Even eyeglasses with thinner frames ,can reduce, the effectiveness of hearing protection by 3-7 ,dB,.