Selection of hearing protection products

In everyday life, noise is difficult to avoid, but what kind of noise can harm our ear health? This is a certain standard.

We must first learn from the hearing system knowledge? Use hearing protection products.

First, understand the noise

What is noise? It should be said that everything is annoying and irritating. The sounds that people do not want to listen to are buzzing. Noise is a kind of sound, which is also caused by the vibration of an object.

When we are exposed to noise, we must protect our hearing. There are two means to measure whether there is damage to our human ears: frequency and intensity.

The frequency is the number of vibrations of the sound waves in one second. It is expressed in Hertz (Hz). We can understand the frequency as the tone. When the frequency is high, the sound will be sharp, the frequency low, and the sound will be thick.

The intensity of the sound is represented by the negative (dB), which represents the pressure or intensity of the sound wave. In daily life, we understand it as the volume, some soft, some noisy.

When the frequency or intensity of sound is high enough, it becomes a noise that is harmful to us. The intensity of the harm of noise to our body also depends on other factors, such as the length of time exposed to a noisy environment. The longer the exposure, the greater the harm.

Second, how to use hearing protection products correctly (link: http://Html/20087/2008721113938.html)

The current noise standards in China have strict regulations on permissible noise and the corresponding exposure time, and it is clear that workers should be given ear protection products before they reach the standards to protect the health of workers. The most common types of hearing protection products are: earplugs and earmuffs. Among them earplugs include repeated use and discarded; two. A good hearing protection product, whether earplugs or earmuffs should have the following characteristics: 1 better with the ear; 2 can effectively filter noise; 3 feel comfortable when wearing; 4 easy to use; Other protective equipment, such as helmets, masks, helmets, etc., can be well used.

Third, the origin and choice of earplugs (link: http://Html/201312/20131217104152.html)
The earliest earplugs were invented in Europe. Legend has it that the Scottish fishermen use a waxy earplug to resist the squeaky sound of the sea monster. The earliest earplug products also originated in Europe. Wax earplugs are the most traditional materials. It can be softened by hand and shaped to fit the ear canal. However, the disadvantage is that it is not hygienic. The wax may remain in the ear canal and is not easy to clean. And wearing a long ear will feel pain. Later, due to continuous development of new materials, a flexible material has gradually become the mainstream for the production of earplugs. It is a polyvinyl chloride (PVC) foam earplug with slow rebound characteristics. The slow-recovery earbuds slowly expand in a few minutes after they have been smashed into thin strips and gradually return to their original shape. It is entirely possible to create earphones of different specifications and shapes that are easy to wear. However, after the EU had a new definition of PVC manufactured products, they found that the PVC composition contained toxins and was not suitable for making products that were close to the human body, and the use of the material was completely banned. Therefore, the materials used for making earplugs abroad today have been replaced with PU materials instead of PVC.

1, identify good and bad

Slow rebound effect: too much elasticity, anti-noise earplugs expand the skin when pressing the external auditory canal, can cause ear distension, earache and other discomfort; the elasticity is too small can not be in close contact with the external auditory canal, the sound insulation effect is reduced. Therefore, the earplug's rebound speed must be observed. The longer the rebound time, the better the quality.

Softness: Softness directly affects the comfort of wearing earplugs

Surface texture: Some earplugs feel sticky and stick in the ear and stick to the skin of the ear canal. Avoid buying. The best way to discriminate is to stick the two earplugs tightly together and separate them to see if they are separated as quickly as possible.

2, hidden danger

The use of earplugs may cause cerumen to be pushed into the middle ear while the earplug is inserted into the ear canal, which can cause tinnitus, diminish hearing, pain or bacterial infection.

Users with excessive cerumen should use earplugs more carefully, and earplugs should often be washed with water and mild soap. However, foam-type earbuds are generally disposable and disposable, and soaking them in water may lose the slow rebound characteristics.

In addition, anti-noise earplugs may also be a trigger for otitis, because in warm, humid environments, many bacteria multiply more vigorously.

However, the use of noise-proof earplugs is generally safe, but the potential dangers that may arise from long-term use must be prevented: Insertion of the earbuds can cause the pressure of the middle ear to rise and push the eardrum to cause pain because the earplugs are inserted too deeply. To avoid this danger, first squeeze the earbuds into the ideal position, and when the earbuds are fully inflated, it is better not to push in. And vice versa, in order to prevent the ear drum from being squeezed when pulling out the earplug, the earplug should be slowly unscrewed and not pulled out.

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