How many decibels above is considered noise, and how many decibels above is considered noise

1. If it is in schools, government agencies and villages, it is above 55 decibels during the day and above 45 decibels at night.

2. In areas that need to be quiet, such as recuperation areas and high-end villa areas, more than 5 decibels during the day and more than 4 decibels at night are noise.

3. In residential areas, commercial areas and industrial mixed areas, more than 6 decibels during the day and more than 5 decibels at night are called noise.

4. If it is an industrial area, it is more than 65 decibels during the day and more than 55 decibels at night for noise.

5. In the areas on both sides of urban road traffic, waterway inland rivers and railway trunk lines, more than 7 decibels during the day and more than 55 decibels at night are noise.

6. If you live or work in a noisy environment for a long time, it will cause noise deafness and tinnitus, and if it is noise deafness and tinnitus, it is irreversible hearing loss.

Legal Analysis: Relevant provisions: The noise standard value of the residential, cultural and educational institutions and the rural living environment shall be 55 decibels during the day and 45 decibels at night; The equivalent noise level is 60 dB in commercial and industrial mixed areas, and 50 dB at night; On both sides of the traffic arteries in the city, the equivalent noise level of noise is 70 decibels during the day and no more than 55 decibels at night.

Legal basis: "Environmental Noise Standards for Urban Areas of the People's Republic of China".

Article 64: This Law shall come into force on March 1, 1997. The Regulations of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution promulgated on September 26, 1989 shall be repealed at the same time.

People's Republic of China Environmental Noise Standards for Urban Areas.

1 Subject content and scope of application.

This standard specifies the maximum limits for environmental noise in five types of urban areas.

This standard applies to urban areas. Rural living areas can be implemented with reference to this standard.

2 Criterion.

The standard values of urban Class 5 environmental noise are as follows:

Category: Daytime, Night.

Class 0 50 dB 40 dB.

Class 1: 55 dB, 45 dB.

Class 2: 60 dB, 50 dB.

Class 3 65 dB 55 dB.

Class 4 70 dB 55 dB.

3 Applicable areas of various standards.

1) Category 0 standard is applicable to areas that need to be quiet such as recuperation areas, high-end villa areas, and high-end hotel areas. This type of area located in the suburbs and villages is strictly implemented at 5 decibels stricter than the 0 class standard.

2) Category 1 standards are applicable to areas dominated by residential, cultural and educational institutions. Rural living environments can refer to the implementation of such standards.

3) Category 2 standards are applicable to residential, commercial, and industrial mixed areas.

4) Category 3 standards apply to industrial zones.

5) Category 4 standards are applicable to the areas on both sides of the road traffic arteries in the city, and the areas on both sides of the inland waterway through the urban area. The same standard is also applied to the background noise (i.e., the noise level when the train does not pass) in the area on both sides of the main and secondary railway lines that pass through the urban area.

4 Sudden noise at night.

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

The People's Republic of China Industrial Enterprise Boundary Noise Standard.

1 Scope of application of the standard.

This standard applies to the boundaries of factories and enterprises and institutions that may cause noise pollution.

2 Criterion.

The standard values of noise at the boundary of various types of plants are as follows:

Category: Daytime, Night.

Class 1: 55 dB to 45 dB.

Class II: 60 dB, 50 dB.

Class III: 65 dB and 55 dB.

Class IV: 70 dB and 55 dB.

3. Delineation of the scope of application of various standards.

The first type of standard is applicable to areas dominated by residential, cultural and educational institutions.

The second category of standards applies to residential, commercial, industrial mixed areas and central business districts.

Category 3 standards apply to industrial zones.

Category 4 standards apply to areas on both sides of the traffic arteries.

4. The scope of application of various standards shall be delineated by local people.

5 Frequent bursts of noise (e.g., exhaust noise) at night. The peak value should not exceed the standard value of 10 decibels, and the peak value of the occasional sudden noise at night (such as a short whistle sound) should not exceed the standard value of 15 decibels.

The equivalent noise level is 55 dB during the day and 45 dB at night; The equivalent noise level is 60 dB in commercial and industrial mixed areas, and 50 dB at night; On both sides of the traffic arteries in the city, the equivalent noise level of noise is 70 decibels during the day and no more than 55 decibels at night.

According to medical experts, under normal circumstances, if the noise exceeds 50 decibels, the human nervous system will be affected if you are in this environment for a long time. For every 3 decibels of noise, noise energy is doubled.

Noise pollution is so severe that it can even damage the human auditory system. Often in the noise trouble, there will be memory loss, insomnia and other symptoms. Studies have shown that women who live or work near airports or railways for a long time have a significantly higher proportion of mental retardation and malformations than in other regions after pregnancy.

The maximum noise level for each construction activity is regulated, such as 92 decibels for carpenters, 85 decibels for grinders, etc. When the construction site noise exceeds 140 decibels, a part of the machinery must be stopped. Noise pollution is also becoming more and more serious in cities in some developing countries, with noise levels reaching 75-80 decibels throughout the day in some areas.

Studies have shown that human hearing can accept a maximum volume of 30 decibels, when the continuous noise pollution in the room exceeds 30 decibels, people's normal sleep will be disturbed, and continuous living in a noise environment above 70 decibels, people's hearing and physical health will be affected. New scientific research confirms that noise can also harm people's eyes, causing eye fatigue and vision loss.

When the noise intensity is 90 decibels, about half of the people will have dilated pupils and blurred vision; When the noise reaches or exceeds 110 decibels, almost all people's eyeballs have varying degrees of adaptation to light brightness. This is why people who live in noisy environments for a long time are particularly prone to eye fatigue, eye swelling and pain, eye dizziness, and visual tears.

The standard is 60 decibels during the day and 50 decibels at night. The "Methods for Measuring Environmental Noise in Urban Areas" stipulates that when measurements must be made indoors, the indoor noise standard should be 10 decibels lower than that of the area.

More than 60 dB is considered noise

Basic concept: decibels, decibels are the unit of magnitude of the sound pressure level (symbol: db), for every doubling of the sound pressure, the sound pressure level increases by 6 decibels.

1 decibel is the sound that the human ear can just hear, the sound below 20 decibels, generally speaking, we think it is quiet, of course, generally below 15 decibels, we can consider it to belong"Dead silence"of. 20-40 decibels is about the whisper in a couple's ear. 40-60 decibels is our normal conversational sound.

More than 60 decibels belong to the noisy range, 70 decibels we can think that it is very noisy, and begin to damage the hearing nerve, more than 90 decibels will make hearing impaired, and stay in a space of 100-120 decibels, if there is no accident, a minute human beings will be temporarily deaf (deaf). The noise of a car is between 80 and 100 decibels, taking a car emitting 90 decibels as an example, at a distance of 100 meters, a noise of 81 decibels can still be heard (the above standards will vary depending on the environment, and are not absolute).

Irregular sounds can be understood as noise. There are several main types of urban noise, one is construction noise, which is phased. The other is traffic noise, which lasts for a long time.

The third type of noise is the noise of our lives, such as the noise of entertainment venues, the sound of playing mahjong, **TV, etc.

Among these kinds of noise, the most difficult to deal with is car noise, and by dealing with car noise, it is theoretically possible to solve the problem of living noise at the same time, of course, low-intensity construction noise can also be solved. But all I can say about the sound of piling is that it is very difficult to deal with at the moment, except that they are not able to renovate our homes to soundproofing standards in the soundproofing room, except that they are downtime for a limited time.

More than 50 decibels is considered noise.

A noise level of 30 to 40 dB is a relatively quiet normal environment; Anything above 50 decibels can affect sleep and rest. Due to insufficient rest, fatigue cannot be eliminated, and normal physiological functions will be affected to a certain extent;

More than 70 decibels interfere with conversation, causing upset, lack of concentration, affecting work efficiency, and even accidents; Long-term work or living in a noise environment above 90 decibels can seriously affect hearing and lead to the occurrence of other diseases.

1) During the dynamic test, the noise level in the clean room should not exceed 70 decibels.

2) During the empty test, the noise level of the turbulent clean room should not be greater than 60 decibels; The noise level of a laminar flow cleanroom should not be greater than 65 dB A.

Extended Information: Indoor noise standards can be divided into residential and non-residential types. The residential indoor noise standard is formulated according to the requirements of quiet life and the environmental noise standard of the area, with reference to the conditions of residential windows, and generally should not be lower than the environmental noise standard of the area by 20 decibels.

The indoor standard for residential buildings in China is 10 decibels lower than the ambient noise standard in the area where they are located, because there are more small factories in Chinese cities that are close to the homes. Indoor noise standards for non-residential buildings are specified according to the purpose of the room. General noise standards for various non-residential rooms.

Hello, different types of environments, the definition of noise is different, the current index is the 2008 national promulgation of GB-22337 social living environment noise emission standards.

Class 0 Biological Environment Functional Area:

**Wellness areas and other areas that are particularly in need of quiet.

Class 1 Acoustic Environment Functional Area:

It refers to the area with residential housing, medical and health care, culture and education, scientific research and design, and administrative office as the main functions, and needs to be kept quiet.

Class 2 Acoustic Environment Functional Area:

It refers to the area where commercial finance and bazaar are the main functions, or where residential, commercial and industrial areas are mixed, and it is necessary to maintain a quiet residence.

Class 3 Acoustic Environment Functional Area:

It refers to the area with industrial production, warehousing and logistics as the main function, and it is necessary to place the area where industrial noise has a serious impact on the surrounding environment.

Category 4 Acoustic Environment Functional Area:

It refers to the area within a certain distance on both sides of the traffic artery that needs to prevent traffic noise from having a serious impact on the surrounding environment, including two types: Class 4A and Class 4B. Category 4A is expressways, first-class highways, second-class roads, urban expressways, urban trunk roads, urban secondary trunk roads, urban rail transit (ground section), and areas on both sides of Hanoi waterways; Category 4B is the area on both sides of the main railway line.

Legal Analysis: The noise pollution standard is between 45 decibels and 55 decibels, and the volume exceeding this standard is considered noise nuisance. Property management enterprises shall stop the environmental noise pollution in the management area, and report to the supervision and management department of environmental noise pollution prevention and control in a timely manner.

Citizens can call 12369 to complain to the local environmental protection department, or contact the local city management department or 110 to negotiate a solution.

Legal basis: Environmental Noise Standards for Urban Areas.

1) "Special residential area" refers to a residential area that requires special quiet, and the standard environmental noise value is 45 decibels during the day and 35 decibels at night.

2) "Residential, cultural and educational areas" refers to purely residential areas and cultural, educational, and institutional areas, and the standard environmental noise value is 50 decibels during the day and 40 decibels at night.

3) "Class I mixed area" refers to the general commercial and residential mixed area, and the standard value of environmental noise is 55 decibels during the day and 45 decibels at night.

4) "Class II mixed area" refers to the mixed area of industry, commerce, traffic and residential, and "central business area" refers to the prosperous area where business is concentrated, and the standard environmental noise value of both is 60 decibels during the day and 50 decibels at night.

5) "Industrial concentration area" refers to an industrial zone clearly defined in the planning of a city or region, and its environmental noise standard value is 65 decibels during the day and 55 decibels at night.

6) "Both sides of the traffic artery" refers to the two sides of the road with a traffic volume of more than 100 vehicles per hour, and the standard environmental noise value is 70 decibels during the day and 55 decibels at night.

Legal basis: "Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution" Article 6 The competent department of ecology and environment shall implement unified supervision and management of the prevention and control of environmental noise pollution nationwide. The competent departments of ecology and environment of the local people's governments at or above the county level shall implement unified supervision and management of the prevention and control of environmental noise pollution within their respective administrative areas.