American researchers have found that urban traffic noise has reached the level of hearing damage. And the damage is irreversible. 1t is known that about 30 million people in the world are suffering from noise induced hearing loss. Scientists measured the noise level of New York’s public transportation system and found that the noise level of light rail reached 79.4 decibels; The noise in the subway reaches 80.4 decibels, the subway platform reaches 102.1 decibels, and the bus platform reaches about 101.6 decibels. Generally speaking, the outside is higher than the inside, the big station is higher than the small station, and the underground is higher than the ground. The outside is higher than the inside, the big station is higher than the small station, and the underground is higher than the ground. The outside is higher than the inside, the big station is higher than the small station, and the underground is higher than the ground
researchers have shown that if people wait for about 2 minutes on a noisy platform every day, it may lead to auditory nerve damage and hearing loss. Working in a slightly noisy environment may lead to chronic damage, and as long as the noise level increases a little, the risk of damage will increase significantly. For example, the risk of 95 decibels is 10 times that of 85 decibels and 100 times that of 75 decibels. “As long as your hearing sensitivity decreases by 10 decibels, your ability to hear others will be greatly reduced.”
for this reason, scientists say that noise can be blocked and hearing can be protected by using anti noise earplugs. However, we can’t use MP3 and other music listening devices, because people often turn up the sound to cover up the external noise, which will cause more damage to the hearing. All kinds of anti noise earplugs and earmuffs can effectively reduce the noise level to a safe range. Researchers suggest that you can wear them when you go out
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