CCTV News : The World Health Organization recently released a set of data. Currently, about 1.1 billion young people aged 12-35 around the world are facing the risk of irreversible hearing loss, and the volume of personal audio devices Too big, becoming the "number one killer" of hearing loss. WHO Director General Tedros Adhanom Ghebreyesus said: “Now that we have the technical knowledge to prevent hearing loss, we should not allow so many young people to continue to damage their hearing by listening to music. They must understand that once hearing loss occurs, It will not be restored.
WHO also called on regulators and manufacturers to ensure that software to control volume and listening time is installed on smartphones and other music players to prevent users from listening to music for too long or changing the volume during listening. Too big.
At present, there are about 466 million people with disabling hearing loss in the world, accounting for more than 5% of the global population. It is estimated that by 2050, more than 900 million people will suffer from disabling hearing loss.
The data is worrying, and the reality is even more worrying. It is not optimistic. On the streets, bus stations, subways, and restaurants, you can see young people wearing headphones and turning up the volume to listen to music. While they are listening to music, they do not know that their ears are being damaged.
Ms. Zhang takes the subway to and from get off work every day. She always wears headphones to shuttle in the subway for two hours every day. In the noisy subway car, they always turn the volume of the headphones very high. Experts in . After testing in the carriage of Beijing Subway Line 5, it was found that the subway noise during travel has exceeded 80 decibels.
Experts emphasized that if you listen to your Walkman in the subway at a noise level of more than 80 decibels, the output of the headphones will be affected by the noisy outside environment. The higher the volume, the more serious the damage to hearing.
At the suggestion of the tester, Ms. Zhang came to the China Rehabilitation Center for Deaf Children for examination. The doctor told her that because she had been wearing the Walkman on the subway for a long time. Listening to music in noisy places, after a doctor's tuning fork examination and pure tone test, Ms. Zhang's hearing has dropped 40 decibels compared with ordinary people.
Experts pointed out that during the use of the Walkman, inner-ear earplugs will increase people's risk of hearing damage. , in a subway car, it is a closed environment, which will produce a certain amount of pressure on people's ears. If you wear headphones and press them tightly into your ears, the intense sound will continuously hit the eardrum, which will cause hair cells damage.
Keep in mind the "60-60" principle of hearing protection
We will also emphasize to you the "60-60" principle said by experts: when using headphones, the volume should generally not exceed 60% of the maximum volume; use headphones continuously. The time should not exceed 60 minutes. In addition, adults should not wear headphones for more than 3 to 4 hours a day, and minors should not wear headphones for more than 2 hours. It should also be noted that they can cause noise damage and are also prone to oppression. Ears, causing physical damage to the ears; do not listen to music in a noisy environment. When you find that you cannot hear clearly when the volume is turned up to 60% in a noisy environment, it is time to take off the headphones.
90-100 decibels can cause hearing loss
Data shows that 90-100 decibels can cause hearing loss, and 100-120 decibels can be unbearable and can cause temporary deafness in a few minutes. So some people say that it’s okay to listen with both ears in turn. In fact, this is unscientific. Wearing headphones in one ear will not only cause hearing imbalance, but also cause brain fatigue. In addition, experts also pointed out that in-ear headphones are easy to breed bacteria. If the ears are damaged, they can easily cause inflammation, increase earwax and even form embolism, causing tinnitus, dizziness and other symptoms. Doctors recommend cleaning and disinfecting headphones with 75% alcohol every week, and try not to cross-use them to avoid infection.
