The impact of noise on human health
Generally, noise higher than 50Db(A) has a detrimental effect on people's daily work and life. Specific hazards are as follows:
Hearing impairment
Noise is the sensory hair cells that damage the organ of the ear (the cochlea). Once the cells are damaged, they will never recover. Feeling high frequency of feeling cells are most vulnerable to noise, so the average person's hearing has been affected by noise. If you do not have a hearing test, you are often unconscious. It is too late until the hearing loss is unable to communicate with others. Early hearing loss is most likely to occur at 4000 Hz and bilaterally symmetric (4 Kdip). The patient is mainly unable to hear soft and high frequency sounds. Unless suddenly exposed to very strong sounds such as gunshots, firecrackers, etc., the loss of hearing is gradual.
Causing cardiovascular damage
Acute noise exposure often causes high blood pressure, and the secretion of adrenal hormone is elevated at 100 decibels for 10 minutes, and the sympathetic nerve is excited. The same findings were found in animal experiments. Although epidemiological findings are inconsistent, several large studies have shown a positive correlation between long-term noise exposure and hypertension. Exposure noise from 70 decibels to 90 decibels for five years, the risk of getting high blood pressure is as high as 2.47 times.
The impact of noise on fertility
Since 2000, some experts have proposed the "environmental hormone" theory, pointing out that there are chemicals in the environment that can affect the body's secretory function like hormones. Noise is one of them. It can cause disorders in the body, leading to abnormal semen and sperm. Long-term noise pollution can cause male infertility; for women, it can lead to miscarriage and fetal malformations. Research in other areas is still inconclusive and remains to be further explored.
The effect of noise on sleep
Up to 28% of people think that noise affects sleep, but whether it is harmful to health under long-term effects remains to be further explored.
The impact of noise on the mind
Under high-frequency noise, most people have symptoms of anxiety and excitement. Someone
noise
The study found that the higher the noise of the workplace, the more accidents and the lower the productivity, the result is still controversial.
With so many hazards, we can use a multi-function sound level meter to determine whether the sound in life meets the noise standard, so as to stop the noise and live a healthy life.
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