Headphones have become the most indispensable must-have items in the daily life. They shield the aunt's roar in the subway and keep the last space in the office. You use it to listen to music, watch videos, make phone calls, and make voices. Important, let Apple almost offend half of the earth because of changing an interface. However, wearing earphones for a long time is harmful to the ear, the eardrum is very sensitive, and more than half of the middle-aged and older people over 65 years old will have a certain degree of irreversible hearing damage. According to the World Health Organization report, with the ever-increasing volume of mobile phones, more than 1.1 billion young people are at risk of irreversible hearing impairment. More than half of the population aged 12-35 in developed countries have long been in an unsafe sound environment.
So go back to reality, when you have a form to be handed in the afternoon, the office is too noisy, in order to keep your own land, to ensure work efficiency, and not hurt the ears, can we only plug cotton to work?
The structure of the human ear is an extremely delicate design. The person from the outer ear (auricle) is basically a reverse loudspeaker that captures the sound waves and then transmits them into the ear canal like a funnel. The sound waves follow the vibrating eardrum, then Causes the vibration of the three small bones in the middle ear. These bones tremble on the inner ear filled with liquid. The hair cells in the inner ear monitor the sound waves, transform it into signals and transmit them to the brain, which is finally recognized by the brain. Pushing down the last domino, the ear is considered to complete the task. It causes irreversible hearing loss, which is caused by the damage of hair cells.
Like all mammals, humans know that hair cells are extremely vulnerable to excessive noise. For self-protection, people also instinctively reflect rejection of excessive volume, but I don’t know that warm boiled frogs can cause The same irreversible consequences. Experiments show that mice have been in a relatively light noise environment for a long time, causing irreversible damage to hair cells and other auditory nerves. When we thought that the restaurant was too noisy, we could not hear the waiter's recommended dishes. At the time, our ears have been silently hurt to some extent.
Although the name carries two words of noise, white noise is actually a good signal frequency, a random signal with a constant power spectral density or a random process. White noise is very stable across the frequency band and helps people relax, create shadowing effects, and shield the outside world. The sound changes to reduce the interference. The sound environment of the baby in the mother's stomach is very similar to the white noise, so many mothers will put white noise to comfort the baby, give the baby a certain sense of security, let the baby fall asleep quickly. Rain Sound and wind are all kinds of white noise, similar to the feeling of sleeping better in rainy days, but also caused by the shadowing effect.
In places with relatively low background noise in the office, it is necessary to shield colleagues who call next door. White noise is one of the most convenient methods for not damaging hearing. Some companies will add a sound shielding system such as white noise in an open environment. Improve the privacy of the conversation.
Of course, if the white noise is greater than 90 decibels, it will also affect the hearing. Therefore, in the lattice room that is not suitable for cotton, we can also use white noise to create a relatively closed space for ourselves. The neurologist Dr. Tony of Stanford University According to Ricci, the size of the sound and the length of the sound are directly related to hearing impairment. Therefore, when a person inserts the earphone into his ear all day, in an attempt to shield the external sound, the volume must be reduced. Noise is often difficult to detect, so unconsciously, it is easy for people to turn up the white noise to block the outside interference, but it does not know that the ear damage is indirectly. The white noise of the amplifier is unrealistic in the office. Then, the earphones become the remaining choices, and different earphone styles, and some may even cause damage to the ears.
In-ear type is the earliest earphone in all headphones that is suitable for playing white noise. In the office environment, the in-ear headphones are almost in the original noise environment to increase the volume. In fact, whether it is white noise or other music, in-ear type Headphones will increase the burden on the ear and increase the volume. Headphones, in contrast to the in-ear type, let other sounds enter the ear, in the shape, block a part of the sound. Headphones on the one hand let the ears In a relatively isolated space, on the other hand to prevent pressure inside the ear canal.
In contrast, active noise-cancelling headphones that do not increase the volume, but reduce noise, are of course the best choice. The noise-reduction headphones use the microphone on the earmuffs to accept ambient sounds, and cancel the noise through the reverse sound waves, and the noise against the low frequencies. There is a better effect, which is why there is a male neck noise-reducing earphone at the airport. However, the noise-reduction headphones are not so good for relatively high-frequency dialogue sounds. The ambient sound is not the chat sound that sometimes has no frequency.
So even a few thousand noise-reducing headphones, the effect in the office environment is similar to the effect of white noise on ordinary headphones, and there is no wonder because of the price. After all, the most original method of stuffing cotton It is the best way. Of course, we can not plug the cotton, use the earplugs. Put on the earplugs, all the sounds will be lighter, the pressure generated by the sound waves on the ears will naturally decrease. In the industry beyond the human body's tolerance Environment, the most common and direct effective way to reduce noise damage with upper earplugs and earmuffs. Prevent sound from entering the ear from the roots and eliminate possible damage.
However, the office is a subtle environment. You don't want to be disturbed to slow down your progress. On the other hand, even if you have more files on the desk, you probably don't want to be isolated by the whole environment, whether it is white noise or light music. We all need to use headphones to create an environment for us to get rid of. Of course, the result of wearing earplugs for a long time must damage our hearing. However, just like everyone has to drink coffee all night, even if they know something The body is not good, we can only choose the better quality coffee, instead of completely quit it.
The structure of the human ear is an extremely delicate design. The person from the outer ear (auricle) is basically a reverse loudspeaker that captures the sound waves and then transmits them into the ear canal like a funnel. The sound waves follow the vibrating eardrum, then Causes the vibration of the three small bones in the middle ear. These bones tremble on the inner ear filled with liquid. The hair cells in the inner ear monitor the sound waves, transform it into signals and transmit them to the brain, which is finally recognized by the brain. Pushing down the last domino, the ear is considered to complete the task. It causes irreversible hearing loss, which is caused by the damage of hair cells.
Although the name carries two words of noise, white noise is actually a good signal frequency, a random signal with a constant power spectral density or a random process. White noise is very stable across the frequency band and helps people relax, create shadowing effects, and shield the outside world. The sound changes to reduce the interference. The sound environment of the baby in the mother's stomach is very similar to the white noise, so many mothers will put white noise to comfort the baby, give the baby a certain sense of security, let the baby fall asleep quickly. Rain Sound and wind are all kinds of white noise, similar to the feeling of sleeping better in rainy days, but also caused by the shadowing effect.
Of course, if the white noise is greater than 90 decibels, it will also affect the hearing. Therefore, in the lattice room that is not suitable for cotton, we can also use white noise to create a relatively closed space for ourselves. The neurologist Dr. Tony of Stanford University According to Ricci, the size of the sound and the length of the sound are directly related to hearing impairment. Therefore, when a person inserts the earphone into his ear all day, in an attempt to shield the external sound, the volume must be reduced. Noise is often difficult to detect, so unconsciously, it is easy for people to turn up the white noise to block the outside interference, but it does not know that the ear damage is indirectly. The white noise of the amplifier is unrealistic in the office. Then, the earphones become the remaining choices, and different earphone styles, and some may even cause damage to the ears.
In-ear type is the earliest earphone in all headphones that is suitable for playing white noise. In the office environment, the in-ear headphones are almost in the original noise environment to increase the volume. In fact, whether it is white noise or other music, in-ear type Headphones will increase the burden on the ear and increase the volume. Headphones, in contrast to the in-ear type, let other sounds enter the ear, in the shape, block a part of the sound. Headphones on the one hand let the ears In a relatively isolated space, on the other hand to prevent pressure inside the ear canal.
However, the office is a subtle environment. You don't want to be disturbed to slow down your progress. On the other hand, even if you have more files on the desk, you probably don't want to be isolated by the whole environment, whether it is white noise or light music. We all need to use headphones to create an environment for us to get rid of. Of course, the result of wearing earplugs for a long time must damage our hearing. However, just like everyone has to drink coffee all night, even if they know something The body is not good, we can only choose the better quality coffee, instead of completely quit it.
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