What s the magic of noise 5, what s the magic of noise

I think I can use its energy to.

Since noise is an irregular vibration, it can be used to prevent the collapse of a bridge with a lot of traffic, an overpass, or an overpass with trains passing through.

This is to take advantage of its irregularity to avoid accidents caused by resonance.

Although the previous brother said a lot, but it is all a way to prevent noise, please use your brain.

You can also think about it.

It's unpleasant! Anyway, if it's not good, you can combine it and it will be good Example: Make people dizzy!

See how you define noise?

Usually there is no benefit to defining noise, and most of the current technological methods, technologies, and new products are eliminating noise.

Only militarily, the noise of the enemy's submarines is a boon for us, because the enemy can detect the other side before the enemy. At the same time, our noise is not beneficial, and we hope to be able to eliminate it.

Noise in a certain band can be good for bats, but if it exceeds a certain amplitude, it is not beneficial.

When I listen to rock, I think it's noise, but some people think it's **.

In conclusion, there is no benefit to being classified as noise. Good sound is a wonderful note for the person, not noise.

How to deal with noise disturbance: 1. Complain to the public security department, which is mainly responsible for the noise of "social life". 2. You can complain to the environmental protection department, such as the noise generated by night construction on the construction site, enterprise production, catering service industry, etc.

3. Complain to the urban management department that some of the noise made by the retail vendors are also using high-decibel speakers for publicity and sales. Punishment for noise nuisance: Units and individuals who are harmed by environmental noise pollution have the right to require the perpetrator to eliminate the harm; where losses are caused, compensation shall be made in accordance with law.

Relevant laws and regulations: Article 46 of the Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution: When using household appliances, musical instruments or other household indoor entertainment activities, the volume shall be controlled or other effective measures shall be taken to avoid environmental noise pollution to the surrounding residents.

Article 61: Units and individuals who are harmed by environmental noise pollution have the right to request that the perpetrator remove the harm; where losses are caused, compensation shall be made in accordance with law. Disputes over liability and the amount of compensation may be mediated and handled by the competent department of ecology and environment or other supervision and management departments or institutions for the prevention and control of environmental noise pollution at the request of the parties; If mediation fails, the parties may file a lawsuit in the people's court.

The parties may also file a lawsuit directly with the people's court.

Other noises judged according to decibels: the night measurement of the first-class living area is more than 50 decibels, and the night measurement of the second-class living area is more than 65 decibels, as long as it exceeds 22 o'clock in the evening or until 6 o'clock in the morning of the next day, it is disturbing the people, which belongs to noise pollution. In residential areas, the allowable outdoor noise level is 50 decibels during the day and 40 decibels at night.

What are the hazards of noise? Star Awareness Project

Noise in physics means that all sounds that people don't want to hear are noise. So this is not very suitable for power generation. According to common sense, noise is sound, which produces vibrations, which can be used to generate electricity, but only if they are loud enough. The current state of science and technology is not yet supportive.

Can perform military **.

Noise can be eliminated by sound insulation, or the sound waves of the same frequency emitted by 1 2 wavelength sources that differ from the noise wavelength can be used to counteract, and sound absorption devices can also be used.

The following standard methods can be adopted for noise control:

1) Sound absorption and noise reduction is a method to control 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 attenuation muffler is a device that can not only make the air flow pass through but also effectively reduce noise. Mufflers are often used to reduce the noise transmitted at the inlet and outlet of various aerodynamic equipment or along pipes. For example, in internal combustion engines, generator sets, cooling towers, etc.

3) Develop better noise control, use the most advanced sound insulation panels, noise barriers, sound absorbing board materials to block, insulate, absorb sound and build to absorb the sound energy in transmission, or set up barriers to reflect all or part of the sound.

Retrofitting or soundproofing of noise sources 2Sound insulation or sound absorption of noise propagation pathways 3Noise protection for affected personnel.

Founded in 2001 and located in Nanjing, Jiangsu Province, adjacent to Nanjing University, Nanjing Changrong Acoustics Co., Ltd. 832341 is a high-tech enterprise specializing in the research and development of acoustic products. The company mainly develops, produces and sells acoustic products and materials for sound generation and sound absorption, and undertakes the design and construction of various environmental noise control projects, acoustic ash removal and energy-saving projects, ultra-low emission projects, zero wastewater discharge projects, colored plume removal projects, and large-scale acoustic laboratory projects. Main governance methods:

Depending on the situation, there are ways to absorb shocks, isolate sound sources, absorb sound to reduce reverberation, and add mufflers.

Headphones and earplugs are available, with a helmet.

There are three main types of noise: mechanical noise, aerodynamic noise and electromagnetic noise. The general methods of noise control are:

1) Reduce noise from the sound source. Improve the equipment structure, change the operation process, improve the processing accuracy and assembly quality.

2) Reduce noise in the noise propagation pathway. When the factory layout is laid out, the noise source is concentrated away from people or natural barriers (greening trees, buildings, etc.) are built to achieve the purpose of reducing noise.

3) Use sound insulation equipment and soundproof appliances to protect the noise at the noise receiving place to isolate strong noise.

4) Adopt porous sound-absorbing materials, design resonance sound-absorbing structures and other methods to absorb sound, reduce noise or reduce sound at the place where the noise occurs.

Measures to control noise can be aimed at any of the three or any of the above. Noise control includes:

Control at the sound source. To reduce the noise of the sound source, the industry and transportation industry can choose low-noise production equipment and improve the production process, or change the movement mode of the noise source (such as damping, vibration isolation and other measures to reduce the vibration of the solid sound emitter).

Control in the middle of noise propagation. Reduce noise (in the process of propagation) in the sound transmission pathway to control the propagation of noise, change the noise propagation route that has been emitted by the sound source, such as the use of sound absorption, sound insulation, sound barrier, vibration isolation, more tree planting and other measures, as well as reasonable planning of urban and building layout.

Noise attenuation in the human ear. When measures cannot be taken on the sound source and transmission route, or the acoustic measures taken still cannot achieve the expected effect, it is necessary to take protective measures for the sound recipient or sound receptor, such as workers who are exposed to long-term occupational noise can wear earplugs, earmuffs or helmets and other ear protectors.

Nowadays, many families have found that the problem of noise pollution after buying and living in a new house is difficult to solve, and it has become an important problem that plagues life and affects health. In fact, controlling indoor noise pollution should start with buying a house and renovating.

1.Home walls can be soundproofed during decoration, and a layer of soundproof walls can be made with sound-absorbing cotton and gypsum board under the guidance of professionals, or professional soundproofing materials can be used.

2.If the sound insulation effect of the floor is too poor, the floor should be paved with floating sound insulation technology, which can greatly reduce the sound transmission of the floor slab. Carpeting the floor or in the passage section can also reduce noise.

You can also use professional soundproofing materials to make special soundproofing ceilings.

3.Choose soundproof windows that work well. 90% of the external noise is coming in from doors and windows.

Now the more popular method is to choose hollow double-glazed windows and plastic steel casement sealing windows, which can isolate 70 80 noise, while ordinary aluminum alloy single-layer glass windows can only isolate 30 40 noise.

4.Pay attention to the sound insulation of entrance doors and interior doors. Choose a good quality fireproof and soundproof door, which can isolate the noise of about 30 decibels. Families with the elderly and children should pay attention to the sound insulation effect of the interior door when decorating to reduce the mutual influence of family life.

5.The exterior balcony should be renovated with sound insulation treatment of the walls and balcony windows, which can not only prevent the introduction of outdoor noise, but also play the role of thermal insulation.

6.If it is an audiophile and a sound room with practice at home, it should be soundproofed and silenced when decorating. Sound-absorbing materials should be used as much as possible in interior decoration, and soft materials should be used as much as possible on the ground.

7.To solve the sound transmission problem of PVC sewer pipes in the bathroom, you can cover the sound-absorbing board on the water pipe, or install the keel bracket outside the sewer pipe during decoration, and then nail the sound-absorbing board outside, and you can also stick a layer of sponge or PVC foam board inside the sound-absorbing board (the thickness of the board should be more than 1 cm).

8.Pay attention to the airborne sound in the holes in the wall. The wire boxes and socket boxes on the walls of some houses are connected, which will become the channel for sound transmission on the wall, as well as the air conditioning holes, etc., if they are not carefully dealt with in the decoration, they will also become the sound transmission channel.

9.Choose more fabric decoration and soft decoration, because fabric jewelry has a very good sound absorption effect. Generally speaking, the thicker the curtain, the better the sound absorption, and the texture is best in cotton and linen. A well-textured curtain can reduce external noise by 10 to 20.

10.Use the greenery in the room to reduce noise. You can place some green plants with more branches and leaves on the windowsills and balconies facing the street, which can also reduce the introduction of noise.

The most critical and critical point is coming, please don't quarrel on the network, professionally solve the noise problem, don't quarrel the network - one-stop service to solve all your noise problems, what are you waiting for, get in the car quickly.

Noise hazards should be prevented from three aspects: the sound source, the transmission path and the receiver.

l) control and elimination of noise sources, which is a fundamental measure to prevent noise hazards; Different solutions should be taken on a case-by-case basis. The use of silent or low-noise equipment instead of noisy equipment, such as hydraulic pressure instead of high-noise forging, welding instead of riveting, shuttleless instead of shuttled fabric, etc., can be better results.

2) There are generally the following measures to control noise transmission.

1) Sound absorption: Use sound-absorbing materials to decorate the inner surface of the workshop, such as walls and roofs, or hang the space sound absorber in the workshop to absorb radiation and reflected sound energy, so that the noise intensity is reduced. Materials with good sound absorption effect include glass wool, slag wool, foam plastic, felt, cotton wool, aerated concrete, sound-absorbing board, wood wool board, etc. 2) Silencer A device that prevents sound from propagating and allows air flow to pass through, i.e., a muffler.

This is the main measure to prevent aerodynamic noise. Mufflers include resistive mufflers that use sound-absorbing materials to muffle sound, resistant mufflers that are manufactured according to the principle of filtering, and impedance composite mufflers designed using the above two principles.

3) Sound insulation In some cases, certain materials and devices can be used to close the sound source and isolate it from the surrounding environment, such as sound insulation cover and sound insulation room. The soundproofing structure should be tight so that resonances do not affect the soundproofing results.

4) Vibration isolation In order to prevent vibration and noise transmitted through solid materials such as floors and walls, vibration damping devices are set at the junction of the foundation of the machine and the floor and wall, such as rubber pads and asphalt.

5) Health care measures Strengthen personal protection, for the noise in the production site can not be controlled temporarily, or when it is necessary to work under special high-noise conditions, wearing personal protective equipment is an effective measure to protect the hearing organs. Earbuds are the most commonly used one, and the sound insulation effect can reach about 30 decibels. Zero-hearing noise can-noise guards and 3M disposable earplugs are recommended, and workers who are exposed to noise should have regular health check-ups, especially hearing check-ups, to observe hearing changes, so as to detect hearing loss early and take appropriate protective measures in time.

Workers participating in noisy operations should be subject to pre-employment physical examinations, and patients with auditory, cardiovascular and nervous system diseases should not participate in noisy operations. For noisy workers, it is necessary to reasonably arrange rest time, such as the implementation of work breaks, and often supervise and inspect the implementation and effect of preventive measures.

It is possible to install double layers of hollow glass with good sound insulation, and install soundproof curtains.

Ways to prevent noise pollution:1Attenuation at the source of the sound 2weakened during propagation3Examples of weakening at the human ear: 1Acoustic walls for light rail 2It's too noisy, close the windows, and plant a lot of trees around the factory.

Some ways to prevent and control noise pollution (1) Create sound insulation forests (2) Move enterprises with serious noise pollution away from urban areas (3) Prevent at the source and reduce the transmission process.

It is forbidden at the source of sound, no transmission route (flowers, grass), and no hearing (silent earbuds).

It is possible to carry zero |Listen to anti-noise earbuds, the sound isolation effect is better.

The first trick: the wall.

Use wallpaper, or "soft pack" decoration, or cultural stone and other decoration materials to make the surface of the wall rougher, so that the sound waves are refracted many times, so as to reduce the noise. For larger households, a layer of gypsum board can be added to reduce noise. For smaller households, cork can be used to cover the walls, first separating the walls with solid wood in an unequal distance and geometrically, and then covering them with cork.

Noise reduction effect: After the wall is renovated, the noise can be reduced by more than 50 decibels.

Modification notice: Once the wall is remodeled, the indoor area will be relatively reduced.

The second trick: light.

If the color of the ceiling, floor, and wall is too bright, it will interfere with the central nervous system of the human body, make people feel upset, and be particularly sensitive to noise. Therefore, in the selection of various lamps and decorative materials for interior decoration, special attention should be paid to soft light.

The third trick: furniture.

The amount of furniture placed in the home should be moderate, less it is easy to make the sound resonate and resonate in the room, and more is easy to bump into each other. Wood furniture is well insulated, and wood fiber furniture is porous and absorbs noise. Different woods have different levels of sound absorption, and softer woods absorb more sound, such as pine.

Placing a bookcase in front of a wall adjacent to your neighbor's house can block out the sound coming from your neighbor's house.

The fourth trick: cloth art.

The sound-absorbing effect of fabric is well known, so the use of fabric to eliminate noise is also a more common and effective method. Tests have shown that the sound absorption effect and effect of draped and tiled fabrics are the same, such as curtains, carpets, etc., and the sound insulation effect of curtains is the most important.

The fifth trick: glass bricks.

Transparent glass bricks are applied to exterior walls or interior partitions to provide good lighting and a sense of continuity. Glass bricks are low-penetration acoustic elements that can be effectively used in busy streets or homes near factories to block noise distractions. The approximate vacuum state of about atmospheric pressure in the glass can make the glass brick become a better thermal insulation effect than double glazing, and it is the best building material to save energy.

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