"Good health is the capital of the revolution", but in the busy life, everyone is often busy with work, eager to sociate, but ignore the good health of this geomantic land. In fact, usually pay attention to early prevention, health is around us.
Wearing headphones on the bus is the worst way to ruin your hearing
"Hard of hearing at a young age" is not a joke. According to the World Health Organization, 432 million adults and 34 million children worldwide are hearing impaired. About 50% (1.1 billion) of young people between the ages of 12 and 35 are exposed to recreational noise and are at risk of hearing loss.
There are many causes of hearing loss, such as genetic factors, childbirth factors, infectious diseases, ear infections, taking ototoxic drugs, exposure to excessive noise, and aging. Among them, hearing loss caused by recreational noise is preventable and controllable, and should be paid enough attention to.
Nowadays, many young people wear headphones to listen to music, play games or watch dramas in noisy places such as buses and subways while commuting, which is tantamount to self-harm and may cause permanent hearing damage.
The so-called hearing damage is that the ear bears too much sound for too long, which leads to hearing loss. The ears are divided into outer ears, middle ears and inner ears, of which the eardrum, auditory ossicles and cochlea are most closely related to hearing. Sound travels through the external auditory canal to the tympanic membrane, causing vibrations that pass through the auditory ossicles to the fluid-filled cochlea.
Hair cells in the cochlea convert vibrations into electrical signals, which nerve fibers transmit to the brain to produce hearing.
In general, when the sound is consistently higher than 85 decibels, it will cause auditory fatigue.
Subway, bus and other noisy environment, the sound is about 80 decibels, people wear headphones in order to hear the music, naturally will be higher than the ambient noise, and the stimulation of high volume is unaware.
The high sounds constantly shock the fluid in the cochlea, and the inner ear hair cells will be overstimulated and die, and over time, hearing will be damaged.
How should I wear headphones correctly?
When the environment is noisy, to hear the sound in the headset, you need to increase the ambient sound by 6 decibels.
Therefore, if you listen to songs on the subway or bus, many people will involuntarily turn up the volume to cover the noise, and the decibel level in the headphones will be at least 86 decibels.
At this point you think it is just fine, but it is no longer! So, how to wear headphones correctly?
1, reduce the use of headphones, strictly follow the "60-60" principle.
The so-called "60-60" principle refers to an internationally recognized method of hearing protection, that is, when using headphones, the volume generally does not exceed 60% of the maximum volume, and can be adjusted to a lower level; Continuous use of headphones should not exceed 60 minutes.
Adults should not wear headphones for more than 3 to 4 hours a day, minors should not exceed 2 hours, and after wearing headphones for 30 to 40 minutes each time, it is necessary to give the ears a full rest.
- Never sleep with headphones on.
- Don't listen to music in a noisy environment.
When you find yourself in a noisy environment and you can't hear it at 60% volume, it's time to take off your headphones. Continuing to listen will only damage your ears.
- Use headphones with noise-cancelling features.
Try to use over-ear headphones; Try to use headphones in a quiet environment; Try to use headphones with noise cancelling function, because active noise cancelling headphones can reduce the noise impact when listening to music, from the other hand to help us reduce the volume of headphones.
