How many decibels are nuisance during the day?

Daytime noise nuisance standard, according to the "People's Republic of China (PRC) urban regional noise standard", the highest limit of environmental noise in five urban areas is:

1, sanatorium area, senior villa area, senior hotel area, 50 decibels during the day and 40 decibels at night.

2, mainly residential, cultural and educational institutions, 55 decibels during the day and 45 decibels at night.

3, residential, commercial, industrial mixed zone, 60 decibels during the day, 50 decibels at night.

4, industrial zone, 65 decibels during the day, 55 decibels at night.

5. The primary and secondary trunk roads of roads, inland waterways and railways in the city are 70 decibels during the day and 55 decibels at night (from 22: 00 to 6: 00 the next morning at night).

Decibel is a non-SI unit selected by the state, and it is a differential unit among the legal units of measurement in China. Expressed in dB, it is defined as "the differential when the common logarithm of the ratio of two similar powers or powers is multiplied by 10". At the same time, the "quantity equivalent to power" is explained in the Supplementary Explanation of Legal Units in People's Republic of China (PRC): "It usually refers to current square, voltage square, particle velocity square, sound pressure square, displacement square, velocity square, acceleration square, force square, amplitude square, field strength and sound energy density, etc." .

Legal basis: Article 24 of the Law on Public Security Administration Punishment commits one of the following acts and disturbs the order of large-scale mass activities such as culture and sports, and is given a warning or a fine of less than 200 yuan; If the circumstances are serious, he shall be detained for not less than five days but not more than ten days, and may also be fined not more than 500 yuan: (1) forcibly entering the venue; (two) in violation of regulations, fireworks or other items in the venue; (three) display insulting slogans, banners and other items; (4) Besieging referees, athletes or other staff members; (five) throwing debris into the venue, not listening to stop; (six) other acts that disrupt the order of large-scale mass activities. Those who are detained and punished for disturbing the order of sports competitions may also be ordered not to enter sports venues to watch similar competitions within 12 months; Those who enter the stadium illegally are forcibly taken away from the scene.