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 by changing an interface. However, wearing the earphone for a long time damages the ear, and the eardrum is very sensitive. 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 low-decibel noise of the hearing damage 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 transports them into the ear canal like a funnel. The sound waves vibrate with the eardrum, which then causes the three small bones of the middle ear to vibrate. The bones trembled and beat on the inner ear filled with liquid. The hair cells in the inner ear monitor the sound waves, convert them into signals and transmit them to the brain, and finally they are recognized by the brain, and the last domino is pushed down to complete the task. The irreversible hearing loss 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 have shown that mice have been exposed to lighter noise for a long time, causing irreversible damage to hair cells and other auditory nerves. And when we thought that the restaurant was too noisy to hear the waiter's recommended dishes, our ears have been silently hurt to some extent.
White noise shields the outside noise. Although the name carries noise, the white noise is actually a good signal frequency. It is a random signal or a random process with a constant power spectral density. The white noise is very stable across the frequency band and helps people to relax and manufacture. The shadowing effect shields the external sound changes and reduces 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, and let the baby fall asleep quickly. Rain and wind are all white noises, similar to the feeling of sleeping better in rainy days, but also caused by the shadowing effect.
White noise: Random signal with a constant power spectral density or random process. In a place 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-shadowing system such as white noise in an open environment to enhance 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 use white noise to create a relatively closed space for ourselves. Tony Ricci, a neurologist at Stanford University, said that the size of the sound and the length of time it takes to hear 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 outside sound, the volume must be reduced. White noise is often difficult to detect, so unconsciously, it is easy for people to turn up the white noise to block the outside interference, which indirectly causes damage to the ear. Amplifier white noise 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.
The earphones that cover the ear are selected in the ear type, which 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 headphones will increase the burden on the ears 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. On the one hand, the headset allows the ear to be in a relatively isolated space and on the other hand prevents 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 canceling earphone uses the microphone on the earmuff to receive the ambient sound, and the noise is cancelled by the reverse sound wave, which has a better effect on the low frequency noise, which is why a neck noise canceling earphone is often found at the airport. However, the noise canceling headphones are not so good for relatively high-frequency dialogue sounds. The noise-reduction headphones are mainly for continuous ambient sounds rather than chat sounds that sometimes have no frequency.
Therefore, even a few thousand noise-reducing headphones have the same effect in the office environment as the white noise of ordinary headphones, and there is no wonder because of the price. After all, the most primitive method of stuffing cotton is the best way. Of course, we can not use cotton and switch to earplugs. When you put on the earplugs, all the sounds will become lighter, and the pressure generated by the sound waves on the ears will naturally decrease. In industrial environments that are beyond the reach of the human body, the most common and direct method of using upper earplugs and earmuffs to reduce noise intrusion. Prevent sound from entering the ear from the roots and eliminate possible damage.
You can't stop, you can talk loudly later. 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 whole. The environment is isolated, whether it is white noise or light music, we need to use headphones to create a detached environment for us. Of course, the result of long-term wearing earplugs must damage our hearing. However, just as everyone has to drink coffee all night, even if we know that something is bad for us, we can only choose a better quality coffee instead of completely quit it.
