1. Is it easier to insert bullet earplugs? Can the thick end of the ear canal cause discomfort after wearing cylindrical earplugs? Answer: The shape of foam earplugs does not affect the insertion. As shown in the picture on the left below, bullet-shaped and cylindrical earplugs will eventually be kneaded into thin strips after kneading. The shape of the end of foam earplug in the ear canal does not affect its comfort. 2. Is the softer and smoother foam earplug more comfortable to wear? A: No, the comfort of wearing foam earplugs for a long time depends on the resilience pressure of earplugs in the ear canal, not the softness, smoothness or roughness of the hand. 3. Is the resilience time and hardness of foam earplugs constant? A: No, the rebound time of foam earplugs is affected by temperature and humidity, especially those made of polyester (PU). Some customers find that 1 100 earplugs rebound faster in summer, and the earplugs are soft; It is normal for earplugs to harden in winter because of their slow rebound. If used in hot and humid environment, PVC foam earplugs have obvious advantages. 4. Can it be completely soundproof after using 3M earplugs? 3M anti-noise earplugs can only reduce the damage caused by noise to a normal range that does not harm our health. I hope we can't hear anything after wearing earplugs, which is impossible under normal circumstances. In addition, the wearing method of earplugs is very important. If you wear them incorrectly, you will not achieve good results. Will the 5.3M earplug fall into the ear and come out? The design of 3M is very user-friendly, please feel free to use it. 6, 3M earplugs are best for those people?

(1). Sleep quality is not high, or it is sensitive to external noise (2). The learning environment is noisy, so we need to protect our hearing (3). Living in a dormitory or sharing a room with others, your sleep is influenced by others (4). Sleep during long-distance passenger transportation, such as sleeping berth, coach and plane (5). I like to watch all kinds of noisy events, such as F65438. Earplugs that are not used temporarily can be stored in a dry place 10 years or so. What are the types of 8.3M earplugs and what are their differences? There are two kinds of soundproof earplugs, foam material and silicone foam material (not washable) can be used: about 2 weeks. Foamed earplugs are comfortable to wear and sound-proof, but their service life is short. It is recommended to use silicone material (washable) when sleeping. Silicone earplugs can be used for about six months to one year: easy to wear, washable and cost-effective, but sleeping is not recommended. 9. Why do you buy so many pairs of earplugs at once? When the elasticity of earplugs decreases after a period of time, the noise reduction effect of earplugs will decrease, and the surface will become dirty, so it needs to be replaced regularly to avoid breeding bacteria.