See the following chart:
Indoor noise standards can be divided into residential and non-residential two. Residential indoor noise standards are based on the requirements of quiet living and the region's environmental noise standards, with reference to the residential window conditions, generally should not be lower than the region's environmental noise standards 20 decibels. China's residential indoor standards are set at 10 dB below the regional ambient noise standard, because there are more small factories in China's cities that are close to residences. Indoor noise standards for non-residential homes are set according to the use of the room.
China's current national standards are the two main ones, the Sound Environment Quality Standard GB 3096-2008 and the Ambient Noise for Social Life GB 22337-2008.
2018 residential noise pollution standards: the national "Measurement Methods of Environmental Noise in Urban Areas" in Article 5, paragraph 4, provides that when noise measurements are made indoors, the indoor noise limit is lower than the standard value of the area in which it is located by 10 decibels.
: Control Pathways
In China, the relevant standards stipulate that the noise in the residential area, during the daytime can not be more than 55 decibels, and at night it should be less than 45 decibels. Some cities around the world have enacted restrictions on noise generated by transportation. In order to prevent noise, China's famous acoustician Prof. Ma Dayou has summarized and studied the hazards and standards of various types of noise available at home and abroad, and put forward three suggestions:
①To protect people's hearing and health, the permissible value of noise is 75~90 decibels.
②To safeguard conversation and communication, the permissible ambient noise level is 45~60 dB.
3) For sleeping time, 35~50 dB is recommended.
Supplementary:
①30~40dB is the ideal quiet environment.
②70 decibels will affect conversation.
③Long-term living in an environment of more than 90 decibels, hearing will be seriously affected and produce neurasthenia, headaches, high blood pressure and other diseases.
④ If suddenly exposed to up to 150 decibels of noise, the tympanic membrane will rupture and bleed in the light, the ears completely lose hearing; in the heavy case, it will trigger the heart **** vibration, resulting in death.