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Do you know what is ear cover?

cherry chinapromotionalgifts 2015-07-07 15:47:16

                                                                      Do you know what is ear cover?

Prevents noise earmuffs two circles connected by arch of the shell body, the shell with soundabsorbing material and sealing gasket, the overall shape such as headphones. Apply to the high noise environment, sound attenuation can be up to 10 ~ 30 db. Can be used alone, also can be used in conjunction with earplugs. Suitable for all kinds of ear. Easy to take off the wear; But long time have hot feeling.


Types can be divided into earplugs, earmuffs and prevent noise helmet three categories:

 

(1) earplugs: can insert inside the plane or in the entry of the external auditory canal, is suitable for below 115 db noise environment. It has a plastic type and not plastic type two kinds. Plastic earplugs with paraffin cotton yarn acoustic glass materials such as cotton, silly putty. Forming, the user can make use of one or more times per piece. The plasticity is also called the "universal" earplugs ear plugs, made from materials such as plastic, rubber, have a variety of specifications of various sizes. China has made dozens of earplugs.

 

(2) the earmuffs: like headphones, ear cover on the bow frame makes noise attenuation of the device. Noise attenuation of earmuffs can reach as high as 10 ~ 40 decibels, is suitable for the high noise environment, such as shipbuilding, metal structure factory processing workshop, engine test bed, etc. In recent years, some countries will also be fixed on the welding mask or earmuffs and communication wore a receiver or headset. Earplugs and earmuffs can be used alone, also can be used in combinationUsed in combination can make the noise attenuation than used alone for 5 ~ 15 db.

 

  (3) the noise can be the most protected head, such as plus ear cover, to prevent the effect is better. This helmet against noisecollision, warm, with the storm, anti shock waves, and other functions, applicable to the strong noise environment, such as shooting range, tanks tank internal contour noise, high shock environment.


Ear cover is really a lot of good, but because the material problem, wear it will be cold in winterso warm earmuffs arises at the historic moment.