Scientific use of the ear to prevent deafness

Prevention first, treatment second

About 10% of people in the world have < a href = "http: / / www.cyztq. COM /" > hearing impairment < / a >. In these populations, one third of hearing loss is due to not knowing how to protect it. It is particularly worrying that at present, human beings are more vulnerable to hearing loss than ever before, because when the noise pollution around us becomes more and more serious day by day, people’s ear hygiene habits have not been generally developed, and little is known about the harm of exposure to noise environment and how to protect their hearing in noise environment.

So how does noise damage hearing?

If a person stays for a long time continuously or intermittently in a strong sound environment or a pulse sound (a short but strong sound) environment, the sense structure of < a href = "http: / / www.cyztq. COM /" > inner ear < / a > will be damaged, which is easy to cause permanent hearing loss. At the same time, it may be accompanied by tinnitus symptoms, which may gradually disappear or last for a long time, or may appear intermittently.

How do we deal with noise environment?

The pitch of a voice is the frequency of the voice. It is measured in Hertz (Hz). Although people can sense the sound of 20-20000 Hz, the sound of 2000-5000 Hz is the most sensitive area that people can sense. It is the area where speech information is concentrated and the area where noise is most destructive.

The intensity of sound is measured by SPL, which is what we usually call dB. The speech sound pressure level in daily conversation is 50-70 dB.

Sound pressure level table of common noise:

Motorcycle / blower / weeder / blower 80-90 D B

Sawmill / firecracker sound 100-110 D B

Rock / disco 110-125 D B

Ambulance alarm / jet in progress 119-140 DB

According to the occupational safety and health center of the United States, the maximum sound energy that the human body can bear is as follows:

90 d B SPL　　　　　8 hours

95 d B SPL　　　　　 4 hours

100 d B SPL　　　　　2 hours

105 d B SPL　　　　　1 hours

110 d B SPL　　　　　30 minutes

115 d B SPL　　　　　15 minutes

How to protect your hearing?

1. Try to avoid staying in the environment with dangerous sounds (if you need to increase the volume to hear your own voice when you speak, it means that your environment is an auditory dangerous area.)

2. Limit the time in strong acoustic environment.

3. Please wear ear protectors or earmuffs when you are in a strong acoustic environment.

4. Help to protect the hearing of children who are not able to protect themselves.

5. Don’t turn up the volume of Walkman or player in the car.

6. Improve the vigilance to strong noise.

7. After coming out of the dangerous noise environment, let your ears relax for 24 hours.

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