How to protect ears in the noise industry?

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People live in a world full of sound, relying on sound for language communication and various entertainment activities. In daily life and work, people are often exposed to many sounds that affect normal work, study, rest and physical health. These sounds that interfere with the surrounding living environment are called noise.

How to protect ears in the noise industry?


Workers with long-term occupational noise exposure can wear ear protection such as soundproof earplugs, earmuffs or helmets. Studies have shown that when the noise reaches 90 decibels, the sensitivity of the rod cells in people's retina to distinguish light brightness begins to decrease, and the reaction time to identify weak light is prolonged; when the noise reaches 95 decibels, the pupil will dilate; when the noise reaches 115 decibels, the eyes' sensitivity to light brightness begins to decrease. The adaptability will be reduced by 207. In addition, people who are exposed to noise for a long time are most likely to suffer from eye fatigue, eye pain, blurred vision and tearing. Therefore, while protecting your ears, you must also protect your eyes.

When noise control is not carried out or is difficult to carry out on the noise source and the noise propagation path, and when the noise is high, personal protection must be carried out. If you work continuously for a long time in a high-noise environment, you should especially take personal protection. Commonly used personal protection products include earplugs, soundproof cotton, earmuffs and helmets.


1. Earplugs
Usually made of materials such as soft rubber (chloroprene), soft plastic (polyvinyl chloride resin), foam plastic and silicone rubber production. The main shapes include cylindrical and umbrella shapes. According to the size of the human ear canal, there are generally three models: large, medium and small.
Earplugs have a good sound isolation effect on medium and high-frequency noise, but have a poor sound isolation effect on low-frequency sounds. Wearing suitable earplugs can generally reduce mid- and high-frequency noise by 20 to 30dB. In the environment of screaming and harsh high-frequency noise, it can achieve satisfactory noise reduction effect and has little impact on normal conversation.
Earplugs are cheap, economical and durable, compact and easy to carry. However, because people's ear canals are different, the fit is generally not ideal, and they often feel uncomfortable after wearing them, and may even cause ear swelling and ear canal pain.


2. Anti-sound cotton
Soundproof cotton is made of ultra-fine glass wool with a diameter of 1 to 3 μm, which has been chemically softened. When using, tear off a small piece and roll it into a cone shape by hand, then insert it into your ear. The sound insulation effect of soundproof cotton is better than that of ordinary cotton, and the sound insulation value increases with the increase of noise frequency. It is more effective in isolating high-frequency noise. Using this kind of sound-proof cotton in a workshop with strong high-frequency noise will not only not hinder speech communication, but also improve speech clarity.

3. Earmuffs
The earmuffs are composed of a shell (made of hard plastic, hard rubber and metal plate), a sealing gasket (made of multi-brush soft foam with an outer color of polyvinyl chloride film (formed), consisting of bow frame and lining with sound-absorbing material.
The average sound isolation of earmuffs is generally 15-25dB, the high-frequency sound isolation can reach 30dB, and the low-frequency sound isolation is also 12dB. It is mainly used to protect against strong gun pulse noise, aerodynamic noise generated by power machinery such as aircraft engines, rock drills, and internal combustion engines, as well as mechanical noise from various pneumatic tools, riveting, stamping, cold work, etc.
Earmuffs are large and inconvenient to wear, especially in high-temperature jobs and hot seasons. The wearer often feels hot and uncomfortable.

4. Sound-proof helmets
There are two main types: soft anti-noise helmets and hard anti-sound helmets. Soft anti-noise hats are mainly composed of artificial leather hats and earmuffs. It can prevent hearing loss and protect the human head from shock, trauma and cold.
The hard sound-proof helmet is mainly composed of an outer shell (made of fiberglass) lined with sound-absorbing material and earmuffs. It can prevent strong noise from being transmitted to the inner ear through the air conduction and skull, as well as shock wave damage to the hearing and head.

Sound-proof helmets are heavy in weight and often feel uncomfortable when worn, especially in high-temperature operations and hot weather. In mild cases, they may feel stuffy and prone to sweating, and in severe cases, they may cause symptoms of dizziness and dizziness.


5. Protective clothing
Made of fiberglass or aluminum plates, lined with soft porous sound-absorbing materials. It is often used to prevent high-intensity noise above 140dB from harming human internal organs.

NotePay attention to rest and arrange your work and rest time, and prohibit excessive entertainment, which is conducive to hearing recovery; strengthen nutrition and eat more foods rich in vitamins and protein.

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