How to prevent noise pollution and how to control noise pollution?

The basic ways are: reduce the noise vibration source, reduce the noise reflectivity of the sound source, use the absorption, reflection, interference and other characteristics of sound to control the radiation of the sound source, take protective measures against the noise that has been generated, and formulate noise standards and strengthen the relevant management work. Noise propagation generally has three phases, namely:

Noise source - propagation route - receiver.

The specific engineering and technical methods of noise control mainly include:

Sound source control. The first is to improve the structure of operating machinery and equipment and means of transportation, improve the processing accuracy and assembly quality of components, adopt reasonable operation methods, etc., and reduce the noise emission power of the sound source; The second is to use sound absorption, reflection, interference and other technologies to control noise radiation.

Control of transmission routes. One is to keep the noise source away from the place where it needs to be quiet; the second is to change the direction of sound source emission and control the direction of noise propagation; the third is to establish a noise barrier; The fourth is to apply sound-absorbing materials and sound-absorbing structures to convert the noise energy in propagation into thermal energy.

Receiver protection. One is to wear ear protectors; the second is to reduce the exposure time in the noisy environment; Third, according to the hearing test results, the person with significant hearing loss will be removed from the noise environment.

The main measures in terms of management are:

In urban construction, formulate and implement reasonable urban noise prevention and control plans.

Establish and implement relevant standards and regulations for noise control.

Strengthen publicity, education and administrative management. Noise pollution is different from pollution from other harmful substances in that it has no cumulative effect in the environment. The selection of control measures must be determined by comprehensive analysis based on relevant factors such as noise control costs, noise tolerance standards and labor production efficiency.

The impact and harm of noise on people are directly related to the intensity of noise. In buildings, the measures taken to reduce noise are mainly sound insulation and sound absorption. Sound insulation is the isolation of sound sources to prevent noise from being transmitted indoors.

Planting trees on both sides of the road can insulate the houses on both sides. In the building, the sandwich structure made by separating the multi-layer dense material with porous material will also have a good sound insulation effect. In order to eliminate noise, the commonly used sound-absorbing materials are mainly porous sound-absorbing materials, such as glass wool, mineral wool, expanded perlite, perforated sound-absorbing panels, etc.

The sound absorption performance of a material is determined by its roughness, flexibility, porosity and other factors. In addition, the lawn and trees around the building are also good sound-absorbing materials, so we plant flowers and trees, which not only beautifies the environment in which we live and learn, but also prevents noise pollution to the environment. Chinese psychology believes that in addition to considering human factors, the control of noise environment must also take into account economic and technical feasibility.

Adequate noise control must consider the entire system composed of the noise source, the sound transmission pathway, and the recipient.

1) Sound absorption and noise reduction Sound absorption and noise reduction is a method of controlling the intensity of noise in the propagation pathway. The sound-absorbing effect of an object is universal, and the sound-absorbing effect is related not only to the sound-absorbing material, but also to the sound-absorbing structure chosen. This technique is mainly used in interior spaces.

2) Noise Reduction Muffler is a device that can not only pass through the air flow of the dead bush oak, but also effectively reduce the noise. Mufflers are often used to reduce the noise transmitted at the inlet and outlet of various aerodynamic equipment or along pipes. For example, mufflers are widely used in noise control of internal combustion engines, ventilators, blowers, compressors, gas turbines, and various high-pressure, high-gas emissions.

Different mufflers have different noise reduction principles. Commonly used anechoic technologies include resistive anechoic, resistant anechoic, lossy anechoic, diffusion anechoic, etc.

3) Sound insulation and noise reduction: Enclose the machinery and equipment that produce noise in a small space, so that it is isolated from the surrounding environment, so as to reduce the impact of noise on the environment, this practice is called sound insulation. Noise barriers and sound insulation covers are the two main designs Zheng Li, and other sound insulation structures are:

Acoustic chambers, acoustic walls, acoustic curtains, acoustic doors, etc.

1. Hello neighbors! As a human being, please restrain your behavior and don't make all kinds of noise in the middle of the night to affect the rest of others!

2. Hello upstairs neighbors! Please be responsible for your own behavior, all noise over the decibel has been recorded, has been reminded many times, if you do not change again, you will call the police!

3. Neighbor, you are good at Zen Cong! For all the noises made in the middle of the night in your house, I hope this is the last such gentle warning, and there will be no next time!!

4. Please don't make all kinds of noise in the big night, it's too noisy, it affects the rest, it's maddening, please understand each other, thank you!

5. Hello neighbors! Please make your movements smaller every night, after all, there are people living downstairs, let's all understand each other!

6. I'm sorry! Communicate with you in this way! Since the noise in your house is non-stop every day, it makes me have a nervous breakdown! I hope that as neighbors, we can understand each other, develop a good habit for ourselves, and pay attention to the next good environment for others.

With the rapid development of China's economy and the continuous acceleration of the urbanization process, people's level of life and vitality has gradually improved, and the requirements for the environment are getting higher and higher. However, the rapid development of highways, railways, urban railways and other modes of transportation has brought inevitable noise pollution to the work and life of residents along the road.

In order to solve the impact of noise pollution on everyone as soon as possible, Shangfeng Technology combines sound barriers, solar power generation, and advertising and display through the research and development of a professional team, so as to play the role of road lighting, night lighting and advertising carriers while meeting the functions of sound insulation and noise reduction.

In addition to meeting the functional requirements of wind load and railway operation pulsating load, the research and development of the landscape sound barrier has a high sound absorption and insulation effect, and also runs through the concept of low-carbon environmental protection throughout the design, construction and application, not only using green and environmentally friendly materials, but also achieving the goal of energy conservation through structural design, and at the same time has the appearance of integrating with the architectural style, with the effect of increasing and beautifying the city, and integrating with the urban buildings and landscaping around the project.

The addition of solar energy to the sound barrier greatly improves the actual use efficiency of photovoltaic power generation, and has a huge advantage in terms of investment and energy efficiency ratio.

The source of the design concept of the Valley Flower Path, passengers on the train feel as if they are stepping into a quiet and deep valley, bringing passengers passing through here an extraordinary experience.

<> "How to control noise pollution.

Noise control technology can be used in terms of sound source, propagation path, receiver protection, etc.

1) Sound source control.

1) Noise reduction at the sound source, which is the most fundamental measure to prevent noise pollution.

2) Try to use low-noise equipment and processing technology instead of high-noise equipment and processing technology, such as low-noise vibrator smart shed, fan, electric air compressor, electric saw, etc.

3) Install a muffler muffler at the source of Shengbubi, that is, set a muffler at the appropriate position of the inlet and outlet air ducts such as ventilators, blowers, compressors, gas engines, internal combustion engines and various exhaust venting devices.

2) Control of transmission routes.

1) Sound absorption: The use of sound-absorbing materials (mostly made of porous materials) or resonance structures formed by sound-absorbing structures (cavities made of metal or wood sheet drilling) to absorb sound energy and reduce noise.

2) Sound insulation: The sound insulation structure is applied to hinder the propagation of noise into space and separate the receiver from the noise source. Sound insulation structures include sound insulation rooms, sound insulation covers, sound barriers, sound insulation walls, etc.

3) Silencer: Use a muffler to stop propagation. Noise reduction that allows airflow to pass through is the main device for preventing aerodynamic noise. For example, the noise generated by air compressors and internal combustion engines.

4) Vibration and noise reduction: For the noise caused by vibration, reduce the noise by reducing the mechanical vibration, such as coating the damping material on the vibration source, or changing the connection mode of the vibration source with other rigid structures.

3) Protection of the recipient.

Let personnel in noisy environments use earplugs, earmuffs and other protective equipment to reduce the exposure time of relevant personnel in noisy environments, so as to reduce the harm of noise to the human body.

Legal Analysis: A general term for legal norms aimed at controlling and reducing noise generated by human activities and preventing noise from harming human health. The noise prevented and controlled mainly includes construction noise, road traffic noise, noise from work posture and social life.

Legal basis: Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution

Article 4 The local people at all levels shall incorporate the prevention and control of environmental noise pollution into the environmental protection plan, and adopt economic and technical policies and measures conducive to the protection of the sound environment.

Article 5 When formulating urban and rural construction plans, local people at all levels shall fully consider the impact of noise generated by construction projects and regional development and transformation on the surrounding living environment, make overall planning, reasonably arrange functional areas and construction layouts, and prevent or reduce 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 department of ecology and environment of the local people's government at or above the county level shall implement unified supervision and management of the prevention and control of environmental noise pollution within its administrative area. The competent departments of public security, transportation, railways, civil aviation and other departments at all levels and port supervision agencies shall, in accordance with their respective duties, supervise and manage the prevention and control of noise pollution in transportation and social life.

1. General principles of environmental noise pollution prevention and control countermeasures:

Control the impact of environmental noise from the three elements of sound;

Prioritize urban planning to avoid the impact of environmental noise pollution;

Pay attention to the protection of environmentally sensitive groups, reflecting the "people-oriented";

a combination of management and technical means to control environmental noise pollution;

The principles of pertinence, specificity, economic reasonableness, and technical feasibility.

2. Basic methods for preventing and controlling environmental noise pollution:

Scientifically coordinate urban and rural construction planning, clarify land use functional zoning, rationally arrange urban functional areas and construction layouts, and prevent environmental noise pollution;

Noise reduction from the sound source;

Noise reduction by means of propagation (the most common means of preventing and controlling environmental noise pollution);

Noise reduction measures are taken for the objects to be protected.

For mechanical noise caused by vibration, friction, impact, etc., vibration reduction and sound insulation measures are generally adopted. The sound insulation effect of general materials can reach 15-40db

For aerodynamic noise caused by the vibration of the air column, the measures of installing mufflers are generally adopted. 10-25db noise reduction can be achieved, and the sound attenuation effect of the design can be improved if the ventilation volume is reduced.

For the electromagnetic noise generated by some electrical equipment, the equipment is generally installed away from the crowd as much as possible, one is to ensure electromagnetic safety, and the other is to use distance attenuation to reduce noise.

The technical and engineering measures for the prevention and control of environmental noise pollution taken for environmental protection objectives are mainly shielding measures based on sound insulation and sound absorption, so that the protection targets are protected from noise. Generally, the artificially designed sound barrier can achieve a maximum noise reduction effect of 5-12db. The noise reduction effect of the fully enclosed sound barrier can reach 20-30db

3. Industrial noise prevention and control

It is mainly a fixed source of noise for industrial equipment. In the environmental impact assessment document submitted for approval of such projects, the site selection results, general layout of the general plan, noise reduction measures of sound sources, sound barriers to be built and necessary noise prevention and control measures for sensitive buildings shall be given.

We have been engaged in this industry for many years, including all kinds of commercial and residential noise, road and railway noise, industrial noise, production workshop noise, machinery and equipment noise, etc. The noise reduction effect is basically as expected, and there are no technical problems.