pleasant to the ear

Harsh and annoying

Affect people's normal communication

The intensity of the noise, refers to the loudness

Decibel (dB)

The faintest sound one just heard

0dB does not mean there is no sound, it refers to the sound that has just aroused our hearing.

Equivalent to the rustling of fallen leaves in the breeze

An ideal quiet environment;

Will affect sleep and rest

Interfere with conversations and affect work and study

Living in a noise environment above 90dB for a long time will seriously affect hearing and cause neurasthenia, headaches, hypertension and other diseases.

If you are suddenly exposed to a noise environment of up to 159dB, the hearing organs will be damaged, causing periosteum rupture and bleeding, and complete loss of hearing in both ears.

Control noise from these three aspects

Install mufflers at sound sources, prohibit honking, separate industrial areas from living areas, and limit the opening hours of entertainment venues, etc.

Adopt vibration reduction, vibration isolation and other technologies

muffler on motor vehicle

Sound insulation panels, planting trees and grass (absorbing noise), closing doors and windows

Such as sound insulation panels on the side of the road

Forestation belt along highway

Sound silencing technology

Periosteum vibration causes hearing

Wear personal protective equipment such as earplugs, helmets, etc.