You can dial 1 10, and the standard values of class 5 environmental noise in the city are as follows:

Equivalent sound level LAeq dB

Day and night classification

0 50 40

1 55 45

2 60 50

3 65 55

4 70 55

Scope of application of various standards

Level 0 standard is suitable for areas that need to be quiet, such as convalescent areas, senior villa areas, senior hotel areas, etc. , located in the suburbs and rural areas respectively, is 5dB stricter than the 0-level standard.

1 class standard is applicable to areas where residential, cultural and educational institutions are the main ones. Rural living environment can be implemented with reference to such standards.

Level 2 standard is applicable to residential, commercial and industrial mixed areas.

Level 3 standards are applicable to industrial areas.

The four-level standard is applicable to inland waterways on both sides of urban road traffic trunk lines and across urban areas. This kind of standard is also applicable to the limits of background noise (which refers to the noise level of outdated trains) on both sides of the main and secondary lines of railways passing through cities.

Sudden noise at night

The maximum value of sudden noise at night shall not exceed the standard value 15dB.

Hope to adopt, thank you.