According to the World Health Organization (WHO), wearing headphones often with high volume can cause hearing loss. Currently about 5% -10% of the world’s population is deaf and this rate is similar in Vietnam. Most cases of hearing loss are related to noise, including the habit of using headphones.
For normal sound reception, sound waves will propagate into the ear and then pass into the ear, through the ear canal, into the eardrum, causing the middle ear bones to be stimulated, the sound is brought into the cochlea. and transmitted to the brain. When listening through headphones, the sound will be transmitted directly through the ear canal, leading to an increase in pressure inside the ear.
The WHO recommends that the maximum sound level tolerant is 85 decibels, which is equivalent to the noise of a crowded street heard from in cars. This level of audio will be equivalent to the average volume of iPods, music devices …
While current entertainment devices can reach 120 decibels. If the user listens at this maximum volume level within 15 minutes, immediate hearing loss will occur. According to the WHO, there are currently 1.1 billion adults and teenage children around the world at risk of hearing loss due to personal audio devices.
Some people like to wear headphones to sleep, as a form of self-lulling sleep is even more dangerous. The ear is not rested, always subjected to a certain sound frequency, even if it is a small sound, in the long run will lead to deafness. Should only wear headphones in force situations such as not disturbing others, because of the work to do … but should not wear continuously for more than 15 minutes each time to rest the ear.