With the popularity of mobile phones, walkman, mp3 and so on, more people have access to and use headphones. Headphones do bring us a lot of convenience, especially in creating a foreign language learning environment. Some young people wear headphones to listen to music for hours, and the sound is so loud that they don't want to take it off when walking or doing homework, even before going to sleep. This is at the expense of hearing loss.

First, let's briefly understand our ear, which is composed of three parts: the outer ear, the middle ear and the inner ear. The outer ear receives external sounds and causes the eardrum to vibrate along the ear canal. The vibration of the eardrum in the middle ear causes the three small bones of the hammer, the stapes and the incus to vibrate, and the sound is transmitted to the inner ear. The inner ear can generate nerve impulses, and the impulses are converted into nerve energy along the auditory nerve, so that the information of the sound is transmitted to the brain. Listening to headphones for a long time, the sound pressure directly enters the ear and is transmitted to the thin tympanic membrane intensively, without any room for buffering, thus stimulating the endings of the auditory nerve, and the stimulating impulse causes abnormal excitement of the auditory nerve, which is very easy to cause auditory fatigue. It will also cause some systemic adverse effects, such as tinnitus, mild hearing loss, hard of hearing and slight pain in the ears, and there have been cases of sudden deafness; Some students will also have dizziness, brain swelling, difficulty in concentration, decreased sensitivity and memory of thinking and reaction, and become restless and impatient. It will also affect traffic safety for friends who ride bicycles with headphones.

Hearing impairment is irreversible, so we must not ignore it. Attention should be paid to the correct use of headphones: the volume should be controlled so that you can hear clearly, and the time should not exceed 1 hour every day. If you find tinnitus and hearing loss, you should go to the hospital for examination in time and stop using headphones.