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The white sounds heard around our lives include the sound of rain, waterfalls, waves sound, the sound of streams, and the sound of branches in the wind. These sounds are familiar sounds that we usually listen to, so even though they may sound like noise, they are heard without much sound or psychological awareness. Also, I feel stable because it is a natural sound that I have always heard. Moreover, through the white tones of nature, we feel a sense of protection that we are surrounded by the surrounding environment as a member of the universe, allowing listeners to relieve the feeling of silence de-audibly.
After years of various experiments, we found that noise can be medicine. First of all, I listened to the white noise about 10 decibels higher than the usual ambient noise at the office without anyone knowing. After spending a week, the number of chatter and unnecessary body movements decreased significantly while on duty. A month later, when we turned off white noise, we were bored with each other, and the concentration of work dropped significantly—in other words, having some degree of white noise rather than no white noise has increased the book's efficiency.
In summer, setting up a tent on the beach makes you feel relaxed and cheerful in the sea breeze, but you get a night of deep sleep at the sound of breaking waves. In particular, in Japan, the sound of waves on Okinawa Beach is sold on CDs, and it is said to be very popular for citizens to sleep well when resting in sleeping capsules in the city. This is because the white noise hidden in waves' sound stabilizes the mind and body and promotes sleep.
Also, if students hear the white tones of nature, the learning effect will be greatly improved. In Nowon-gu, Seoul, a moisturizer institute, conducted an English word memorization test for male and female middle school students. Depending on the usual condition and the condition when the white notes were played, a completely new high school sophomore-level English word was memorized for five minutes, with a 35.2 percent improvement in academic performance compared to expected.
Another experiment showed how concentration improves when you hear white noise in the reading room. While attaching a device that generates white noise on each desk, they compared the number of times they turn their heads to the next seat or pay attention to their surroundings on an hourly basis. In this case, the number of people interested in the area decreased by about 22 percent when white noise was heard.
We observed changes in concentration when we heard the natural sounds around us in another experiment. They played various sounds around them on a five-minute basis and attended their body movements while studying by age groups such as teenagers, 20s, and 30s. Blood experimenters in their teens and 20s preferred the sound of relatively wide sound waves, such as the sound of water dripping from mineral springs and the sound of showers when their concentration increased. Meanwhile, people in their 30s preferred the sound of white noise, such as the sound of small rain or the sound of a large stream, while increasing their work concentration.
On the other hand, if a newborn baby under three to four months old cries, would the baby be able to relax if he recorded the heartbeat, breathing, and the voices of his mother and father that he might have heard during his fetal life? However, the experiment showed that the baby was getting more anxious and crying for his mother's embrace.
At this time, when you make a squeaking noise from an empty channel on TV, the crying baby stops crying quickly and finds stability. Some parents say that the crying baby has found peace after hearing the vacuum cleaner's sound and that the baby makes a bright face when he/she makes a rustling sound while touching a soft plastic bag. The sound of soothing newborn babies is also a kind of artificially created white noise.
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