Headphones have become a part of modern life, a large number of students and office workers use portable music players, mostly young people, they use headphones for a long time, many problems begin to appear, people begin to pay attention to how to use headphones more healthily. One of the possible reasons why most people are not aware of the hearing damage caused by headphones is that the users are very young and the average person knows that hearing declines with age, but does not care about the damage caused by headphones. The chronic damage to hearing from headphones may be revealed after the age of 40. Headphones act as a sound source very close to the eardrum, and long-term uninterrupted stimulation can cause damage to cochlear hair cells and spiral nerves, leading to noisy deafness and tinnitus. The worst case is that when using headphones in a noisy environment, users involuntarily turn up the volume in order to hear the music playing inside the headphones, leading to hearing damage. Headphones themselves do not damage hearing. It is the inappropriate use of the user that causes hearing damage. Now there is a noise-canceling headphones on the market that can eliminate the noise of the environment. Choosing the right headphones can protect your hearing. There are two main types of headphones on the market, one is the open type, the sound from the headphones is transmitted to the ear canal, but also to the surrounding area. The other is the closed type, the outer ear is completely sealed over or in the ear canal headphones. In a noisy environment, the use of closed type headphones, easy to isolate the outside noise, the user can use a lower volume, not easy to damage the hearing. In a quiet environment, it is recommended to use open type headphones, because in comparison, closed type headphones have a greater sound pressure on the eardrum. Therefore, it is important to choose the right headphones for different sound environments. Pay attention to the following points to help protect hearing: 1. Control the volume: The most important thing to protect hearing is to adjust to the correct volume. (1) users remember the volume level when quiet, if to a noisy environment, do not raise the volume more than a third of the quiet. (2) For open headphones, play the sound, you can still hear the sound of people around you talking clearly, indicating that the volume is safe. For closed headphones, remove a headset, can hear clearly around the sound of other people talking headphones volume is safe. (3) 60-60 principle: volume control at less than 60% of the maximum volume, do not use headphones for more than 60 minutes. (4) If the environment is too noisy, do not continue to listen, choose other activities. 2.Control the use of time. Do not use continuously for more than 1-2 hours. Long time use of headphones will lead to auditory fatigue, and it is easy for users to gradually turn up the volume. Interestingly, most people can not distinguish the difference between 85 decibels and 100 decibels of sound intensity, although the latter is more likely to cause damage. 3, reduce listening to music with strong sound stimulation, such as heavy bass and strong treble music. 4, choose the right headphones. According to a British study, prolonged use of headphones, because of the lack of sound transmission cushioning, can lead to vibration fatigue of the eardrum, resulting in the death of inner ear cells. In general, headphones are better than ear canal headphones, the former after the buffering of the outer ear. Do the headphones fit your ear canal? A good match can isolate the outside noise. In noisy environments, use noise-canceling headphones. 5, ambient sound intensity below 70 decibels, there is no great damage to the human body. But there is a study shows that in a quiet environment, headphone users are comfortable listening at 69 decibels, after moving to 65 decibels noise environment, the average loudness will be tuned to 82 decibels, some will go to 95 decibels. So the noise environment, try not to use headphones. 6, do not listen to headphones when running. The rhythm of the music will affect the pace of running, affecting the blood flow to the brain, making people more easily fatigued, in addition to running so that the blood supply to the ear is reduced, vulnerable to sound damage. There is a study report, aerobic exercise when wearing headphones to listen to loud music, the risk of sound injury doubled. 7, the intensity of the same sound, whether it is noise or beautiful music, the damage to hearing is the same. People tend to involuntarily escape from the difficult noise without being harmed by it, but the good sound of drums or music, may be attracted to it, listening for a long time, ignoring its loudness and hearing damage. Hearing loss from acoustic damage is not necessarily permanent, and early detection and treatment can significantly reduce the damage. Sound damage can be gradual and cumulative, often without obvious signs. A hospital hearing test is the only way to determine hearing damage. People who listen to loud music frequently or are exposed to strong noise should have their hearing checked regularly. The following symptoms alert you to the presence of hearing loss: 1. tinnitus 2. feeling strained to listen to others 3. difficulty hearing words in noisy environments 4. turning up the volume of the TV