One day, dinner at a restaurant with your friends. Seated soon after we upset mania, restaurant was particularly noisy, made people uncomfortable. We are used to the noise of the Chinese restaurant, but still want to keep as much as possible to get a quieter dining environment. We care for PM2.5, ignores the number two killer in the everyday environment – noise pollution. So, we decided to test restaurant in decibels.
, That there is opportunity Jing has written an article about noise the noise just how much harm? 》。 She tried tested the decibels in the subway, fully 90 per cent, has reached the degree of hearing loss. After hearing loss is difficult to restore the ear is the organ of a long term exposure to the outside, we need special care.
Is a sound measure noise decibel value. Human ear can hear is 0-10. Decibels every increase of 10, volume increased 10 times, from 1 DB to 20 DB volume increased by 100 times. People whisper about 30 DB, talking loudly to 60-70 DB.
People sleep at about 30 DB more than 45 decibels it is more difficult to fall asleep. In accordance with the relevant provisions of the State: Uptown decibel value cannot exceed 55 decibels in the daytime, night-time should be less than 45 DB. Also the decibel value cannot be more than 60, but many work environments are functionally illiterate, some reaching more than 70 decibels, it's hard to settle down to focus on the matter at hand. In a noisy environment, the human heart beats faster, blood pressure instability, insufficient blood supply to the limbs, or irregular heartbeat.
Often in 70 DB above life, hearing can be damaged; after more than 100 decibels of noise, can damage hearing. People living in 80~90 decibels of noise environment, easy "noise", such as neurological disorders, insomnia, headaches and even heavier burden of heart and lung
Mobile phone users can download the SOUND METER APP (DB-test software), this software is free, and DB is more accurate. It also has a pro version, editing.
After downloading software, just open it, you can begin testing. Here recommends using the built-in microphone instead of the microphone on the headset, the tests more accurate. Test, away from noise sources around 1 m, more than 1.2 m above the ground; when laboratory tests from the reflector at least 0.5 m from 1.2 meters above the ground, at least 1 m from the window. Recommended testing from a scene, select three efficient tests separately at different times, taking the average.
To the store, I am committed to going to a restaurant the decibel value, because it is very noisy, maintained at around 80 decibels! It feels like the restaurant space is problematic, noises that are tucked away in a space within the release is out, the level of decibels annoying, busing tables, stools, food trucks, serving, the sound of television advertising, the waiter screams, laughter of Diners talking between ... ... All mixed together, and made the dining experience very poor. Six or seven o'clock in the morning and I often come here, compared to peak at night will quiet a lot.
When will a Chinese voice for a change of habit, for his health, and is definitely a big promotion. For example: summons a waiter or a friend when you can walk; when you eat, if you are sitting in the lobby, can you whisper; when in public places, can phone on vibrate? I used to turn the phone to vibrate, because when I focus on one thing, Bell ringing, I have "scared" feeling heart "BAM BAM BAM ~" as if she were about to jump out of. Although there are complaints, but by patience and keep on going.
Aunt Uncle take care yo ear and heart! In the cities, in addition to using public transportation (subway, bus), the largest source of noise is probably the square dance music. 9 o'clock at night streets, happy Ma Yangyang's uncle, a pleasure to themselves and a recreation of passers-by. Boyle investment demand and taking care of people taking pictures of the show, everyone has been very inclusive; noisy noisy point, anyway, we just pass by, lived there
In the bustling streets, decibel values are usually around 70~80. Different decibel values on the subways and buses are also different, but no less than 80. With the progress of science and technology, believes the future of commuting tool more humane, the noise will be less. Such as car, close Windows, car decibels on average between 50~70 (slow to fast), more advanced car interior noise DB value is smaller, only about 40 per cent. However, the decibels of the speaker is as high as 80 per cent. So, people driving less, press speaker
Look, you will find that the city was full of noise pollution. Used in cafes writing manuscripts, out of how to get to now. Estimated to be older, just not too fond of noisy environment. Coffee machines roar, human voices and background music, in fact, quite noisy. Some boutique coffee shops, we sat next to coffee, while watching his debug of coffee while waiting for and tasting, very tasteful, but as a result of too close to the machine, noise is very high.
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