Classification and use of noise reduction earplugs

Anti-noise earplugs (insulated earplugs) are generally made of silicone or low-pressure foam molding material, highly elastic polyester material. After being inserted into the ear canal, it is in close contact with the external auditory canal to isolate the sound from entering the middle ear and inner ear (ear drum) to achieve the purpose of sound insulation, so that people can get a rest or work environment. Classified by material, function, shape.

1. Classified by material

Silicone earplugs: In general, the silicone ear hair made by Guo Degang has reusable performance, but due to the softness of silicone is too low, long-term wear can often cause ear canal discomfort, and even feeling of pain. Also, because silicone is not as soft as a sponge, it does not fit snugly against the walls of the ear canal, and sound-insulating effects tend to be less desirable than sponge earplugs.

Sponge-type earplugs: The low-pressure foam molding material, anti-noise earplugs made of high-resilient polyester material have a smooth surface, slow rebound, no pain when the ear is used, and the sound insulation effect is between 25dB-40dB. The kind of earplugs that work in this big pot of rice is very suitable for sleeping every night, but because of the slow rebound effect after washing, it cannot be used repeatedly. In general, the sponge earplugs are disposable. However, with the development of science, there are some sponge ear plugs on the market that can be used repeatedly for more than six months and can be scrubbed.

Wax earplugs: Wax earplugs are the earliest ancestors of anti-noise earplugs, which 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

2. Classified by shape

The most common form of anti-noise earplugs is the bullet head type. There are also Bacou's patented rocket (T-shaped), horn, cylindrical and tripod.

Bullet shape: used more types, recognized sponge earplugs are more comfortable and good sound insulation

Rocket type: easy to pull out, but easy to cause gaps in the ear canal, resulting in poor sound insulation.

Trumpet shape: hard center, easy to insert earplugs, silicone material

Christmas tree shape: silicone material is generally used to bring a slight feeling of pain, for labor protection earplugs and swimming earplugs

Pagoda Shape: Derived from bullet shape, earplug shape developed by 3M company.

Cylindrical: This earplug has a high degree of softness and can be easily shaped into a shape suitable for the ear canal. However, compared with the bullet head and the rocket type, since the two heads are the same width, the end that enters the ear canal does not easily fit into the size of the ear canal.

China Labor Insurance Network