Noise poses physical and psychological harm.
Some monitoring shows that the 1 decibels increase in the residential area for a long time, the incidence of hypertension increases by 3%, and it is easy to cause symptoms such as irritability, irritability and fatigue.
According to the World Health Organization volume analogy:
20 decibel whispering
50 decibel normal conversation sound
70 decibel street environment sound
75 decibel human ear comfort ceiling
80 decibel noisy office, sound on the highway
85 decibels and below do not destroy hair cells in the cochlea
90 decibel noisy bar ambient sound, electric saw saw wood sound
100 decibel pressure drill sound, compressed hammer beaten sound
105 decibel permanently damages hearing
110 decibel propeller aircraft take-off sound, rock concert sound
Temporary deafness occurs when 120 decibels exceed one minute
125 decibel jet take off sound
130 decibel rocket launch sound
140 decibel EU defines the highest critical point of total hearing loss
190 decibel leads to death
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