1. The country does not have unified regulations on the size of square dance music. Policies and regulations vary from place to place. The specific local policies and regulations shall prevail.

The "Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution" does not specify how many decibels the sound must reach to constitute the necessary conditions for noise nuisance behavior.

2. National regulations on noise standards:

In China's environmental noise standards, the standard values ??of the five categories of outdoor urban environmental noise are as follows:

1. Category 0 (Referring to residential areas that particularly require quietness, such as rest areas, high-end villa areas, high-end hotel areas, etc.) The limit is 50 decibels during the day and 40 decibels at night.

2. Category 1 (applicable to areas dominated by residences and cultural and educational institutions. Rural living environments can refer to the implementation of this type of standard) daytime limit of 55 decibels and nighttime limit of 45 decibels;

3. Category 2 (applicable to residential, commercial, and industrial mixed areas) daytime limit is 60 decibels, and nighttime limit is 50 decibels;

4. Category 3 (applicable to industrial areas) daytime limit 65 decibels, with a nighttime limit of 55 decibels;

Categories 5 and 4 (applicable to areas on both sides of urban road traffic arteries and inland waterways passing through urban areas. Main and secondary railways passing through urban areas The background noise (referring to the noise level when trains are not passing) limits in areas on both sides of the main line also comply with this type of standard) with a daytime limit of 70 decibels and a nighttime limit of 55 decibels.

Extended information:

Relevant provisions on the prevention and control of noise pollution in social life in Chapter 6 of the "Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution":

Chapter Article 46 When using household appliances, musical instruments or conducting other indoor entertainment activities at home, the volume should be controlled or other effective measures should be taken to avoid environmental noise pollution to surrounding residents.

Social life noise: mainly refers to the noise generated by people in various social activities such as business transactions, sports competitions, parades and rallies, entertainment venues, etc., as well as the noise from various home appliances such as radio recorders, televisions, and washing machines. Sound, this type of noise is generally below 80 decibels.

Reference materials: People's Daily Online - People "cannot afford to be harmed" by the noise caused by square dancing, and various places have issued "rules"

Baidu Encyclopedia - Environmental Noise Standards