Can the use of open air screens reduce noise?

Recently, the Wuhan subway construction site.

Erect a 100-meter-long soundproof screen.

Residents of the neighborhood all said.

Noise at night has improved significantly.

As one of the ten practical things in Wuhan this year, "strict control of construction site noise pollution, complaint disposal rate of 100" work has been carried out for more than half a year, according to the latest data of Wuhan construction noise remediation class, from July 30 to August 5, Wuhan accepted a total of 353 complaints about construction noise at night, a decrease from last year. Active noise reduction at many construction sites.

The soundproof screen installed in the construction site of Zhongnan Hospital Station of Metro Line 8 Phase II. Photo by reporter Liu Bin.

On August 9, at the construction site of Zhongnan Hospital Station of the second phase of Metro Line 8, in order to reduce noise, a total of 125 meters of sound insulation screens were installed at the construction site.

Installation of soundproof screens on the construction site.

The citizens felt that it was quieter at night.

The construction site of Xingguo South Road is close to the residential areas and university dormitories on both sides, and there were many noise complaints received at the beginning of this year.

The soundproof screen installed in the construction site of Zhongnan Hospital Station of Metro Line 8 Phase II. Photo by reporter Liu Bin.

A 90-meter-long, meter-high soundproof screen was installed on the side closest to the residential complex, while a 35-meter-long, 5-meter-high transparent soundproof screen was erected on the side adjacent to a university student apartment. The soundproof screen is filled with sound-absorbing cotton, which has the functions of sound absorption and sound insulation. According to the project manager of the construction party China Railway No. 1 Bureau, the sound insulation screen was installed on May 15, and the measured measurement can be reduced by 10-15 decibels, because it is transparent, it will not affect the lighting of nearby buildings.

Sound insulation and noise reduction equipment in the construction site of Zhongnan Hospital Station of Metro Line 8 Phase II. Photo by reporter Liu Bin.

In addition, there is a fully enclosed rebar processing plant located away from the densely populated area. There are also enclosed machine repair and processing sheds, fully enclosed mechanical mixing plants, and noise reduction equipment such as silent generators, silent smokeless welding machines, and shield blower mufflers are also used in the construction site. At the entrance of the construction site, 3 environmental monitoring systems monitor noise in real time.

It is understood that many noise reduction equipment at this construction site are actively purchased.

It depends on which real estate, the so-called near the subway, far and near have a degree, basically the house along the subway and the subway will have a distance, generally not very noisy, but there are also individual real estate will be close to the subway line, then there will be more or less noise, but in this case the house developers will make double glazing and double balconies to remedy, it may have a little effect, but how much will have an impact, it is recommended to invest in the subway room, I hope to help you, Lianjia Real Estate Wang Jianwei.

Hello, it is a great pleasure to have your question here. Here are some of my thoughts on this issue, and if there are any mistakes, please feel free to point them out. Dear, I don't know if the technology you said refers to the installation of outdoor advertising screens?

If so, this kind of technical work generally requires an electrician certificate and the best art design, and there is a large Ming jujube body to adapt to the fear of heights, if there is high blood pressure, heart disease is best not to engage in this kind of work. Thank you very much for your patience**, if you have Huai Li help, I wish you a happy life! Thank you!

I don't belong, but I'm sorry.

In this case, you should consult a lawyer.

Honglan Bridge is heard very clearly here, not to mention the vicinity of Taiping Bridge, and the scene the next morning, every morning when I go to work and walk there, the cleaners have swept a lot of garbage, hey... I can't help it.

In fact, whether it disturbs the people or whether it is illegal is determined by two factors: 1The sound intensity is up to.

The Taiping Bridge is so remote that it's much better than when I was in the street garden, and I'm confused about who can sing.

A few friends upstairs who think it's not illegal to trouble or Google the "Environmental Noise Pollution Prevention and Control Law" to make up their minds, don't take everything for granted.

Environmental Noise Standards for Urban Areas of the People's Republic of China"1 Subject Content and Scope of Application This standard stipulates the maximum limits of 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 Standard values The standard values of urban environmental noise in class 5 are as follows: Category Day 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) Class 0 standards are suitable for 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 that pass 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.

You're talking about the elevated section. When the train is running, the friction between the rails and the steel wheel will make a loud sound, but in the elevated section (that is, the open-air subway), there will be an audio barrier, which is generally called a soundproof wall. In this way, the noise will be very small, and it will not affect the surrounding environment and bring noise pollution.

Hello, according to your description, the environment you are in is a Class 1 or Class 2 environment, according to the relevant national regulations, Class 1 environmental noise can not exceed 55db during the day and 45db at night, Class 2 environmental noise can not exceed 60db during the day and cannot exceed 50db at nightSo in this case, you can call 12369 to make a complaint**.

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.

The main noise points come from mining equipment such as crushers, air guns, air compressors, forklifts, etc.

But the biggest noise comes from the blasting, which requires special attention to the sound of the blast and the shock wave it generates.

In order to reduce or reduce the noise decibels, you can use tree planting, lubrication and other methods to control the noise, and pay attention to the mining method, to reasonably arrange production, improve production efficiency, so as to reduce the reactive operation of machinery.

As for blasting soundwaves, only by training workers to master blasting techniques can they be able to guess and control the direction of the blasting waves, and avoid facing densely populated areas such as villages and roads to avoid safety accidents.

Now the state requires the use of down-the-hole drilling in mining, and at the same time equipped with excavators (hook machines). Much less noisy than a wind gun.

Phosphate rock powder comes to the carnival to import American white bone essence and is a good person.

City management or 110 is fine.