The most direct harm of noise to human body is hearing loss. When people enter a strong noise environment and are exposed for a period of time, they will feel uncomfortable in both ears and even have a headache. Leave the noisy environment and have a rest in a quiet place, and your hearing will gradually return to normal.
2. Noise can induce many diseases.
Because noise acts on the central nervous system of the brain through the auditory organs and affects all organs of the whole body, noise will not only damage people's hearing, but also bring harm to other systems of the human body. Due to noise, there will be neurasthenia symptoms such as headache, brain swelling, tinnitus, insomnia, general fatigue and memory loss.
3. In addition, noise will also have a certain impact on visual organs, endocrine function and the normal development of the fetus. People who work and live in high noise, the general health level is declining year by year, and their resistance to diseases is weakened, which leads to some diseases, but it is also related to personal physical factors and cannot be generalized.
noise control
In order to prevent noise, Professor Ma, a famous Chinese vocalist, summarized and studied the hazards and standards of various noises at home and abroad, and put forward three suggestions:
(1) In order to protect people's hearing and health, the allowable value of noise is 75~90 decibels.
(2) Ensure conversation and communication, and the allowable value of environmental noise is 45~60 decibels.
(3) It is recommended to sleep at 35~50 decibels.
Baidu encyclopedia-noise pollution