According to the "People's Republic of China *** and the State Urban Area Noise Standard" clearly stipulates the maximum environmental noise limit value of the five categories of urban areas:
1, sanatorium area, high-level villa area, high-level hotel area, daytime 50 decibels, 40 decibels at night;
2, the area of the main residential, cultural and educational institutions, daytime 55 decibels, nighttime 45 decibels;
3, residential, commercial and industrial mixed areas, 60 dB during the day, 50 dB at night;4, industrial areas, 65 dB during the day, 55 dB at night;
5, road traffic in the city on both sides of the main roads, inland waterways, railroads, major and minor trunk line areas, 70 dB during the day, 55 dB at night, (the night refers to the 22 o'clock to the next morning 6 o'clock).