The more buildings in the city, the higher and higher the number of cars on the road, the noise problem of interior decoration has become an important issue, but the problem of sound insulation is not a pure decoration problem, it also involves acoustics. Problems. To solve the problem of sound insulation, we must distinguish between what kind of noise is caused and take a different approach.
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What is noise? Simply put, we can understand the noise as an irregular sound. There are several sources of urban noise, one is construction noise, which is phased. The other type is traffic noise, which has a long-lasting impact. The third type of noise is noise in our lives, such as noise in entertainment venues, playing mahjong sounds, and music videos.
Among these types of noise, the most difficult to deal with is car noise, and the use of noise against cars can theoretically solve the problem of living noise at the same time. Of course, low-intensity construction noise can also be solved. However, I can only say that for the sound of pilings, it is very difficult to deal with them at present. Apart from the fact that they have stopped work within the time limit, we cannot always renovate our homes into soundproofing standards in the auditorium.
First of all, we must first understand a basic concept: decibels, decibels is the size unit of the sound pressure level (symbol: db), each increase in sound pressure, the sound pressure level increases by 6 decibels. 1 dB is a human ear can only hear the sound, 20 dB below the sound, in general, we think it is quiet, of course, in general, below 15 decibels we can think of it as "dead". 20-40 decibels is about the whisper of a couple's ear. 40-60 dB is our normal conversational voice. More than 60 decibels is in the noisy range. At 70 decibels, we can think that it is very noisy and begins to damage the hearing nerves. If more than 90 decibels will cause hearing impairment, we will stay in a space of 100-120 decibels. Unexpectedly, one minute humans have to be temporarily deaf (deaf). Among them, car noise levels range from 80-100 decibels. For example, if a car emits 90 decibels of noise, for example, at a distance of 100 meters, 81 dB of noise can still be heard. (The above standards will vary due to environmental differences, not absolute value).
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The size of traffic noise is affected by the following factors:
1. The higher the traffic volume near the highway, the greater the noise. The main road will definitely be much more noisy than the municipal road.
2. The higher the speed near the highway, the greater the noise.
3. The higher the proportion of heavy vehicles, the greater the noise, such as container trucks (container vehicles).
4. The lower the road surface quality, the greater the noise. With the same road surface quality, there is no deceleration zone with no deceleration zone.
5. The closer to the road, the greater the noise. When the same heavy-duty truck passes by, the house (straight-line straight-line distance) 5.5 meters away from the road at a distance of 10 meters decays by 0.3 decibels, 30 meters by 4 decibels, 50 meters by 6 decibels, and 100 meters by 8.9 decibels.
6, the same distance from the highway, the higher the average residential floor, the greater the noise. (Currently, there is no upper limit data, and it is not ruled out if we reach a certain height. However, it is the case that the general high-rise is 32 stories.) The idea that staying high is far from noise is wrong.
7. Road noise barriers are lighter than those without noise barriers.
8, there is a building block more than no impact.
To solve the traffic noise, we must solve the problem of car noise. There are several types of car noise in general:
1, the sound of car tires and ground friction. This sound is basically bass and accompanied by vibration. This situation is especially close to concrete roads that are more severe than asphalt roads.
2. The sound of automobile engine, exhaust pipe and automobile transmission system. The larger the horsepower and the longer the car, the stronger the noise in this area.
3, car horns, wind resistance and brakes, speed bumps and carrier impact caused by vehicle vibration sound.
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Knowing the main source and classification of noise, I can solve it one by one.
1. The best way to deal with noise is to tighten the windows. Whether you are a single window or a double window, the seal is the most important. The barrel load is determined by the shortest wood chips, and the sound insulation effect is determined by the weakest link. From the current technological level, using steel windows as a means of sealing is the most effective renovation program. For users who have already adopted aluminum alloys, it should be ensured that the seal of the aluminum alloy frame is intact. In contrast, aluminum alloy windows have poorer sealing than plastic windows.
2, the window seal solution, the next step is to make it more sealed, after all, noise is not sealed on the line, but also have to see the sealing performance. The use of hollow glass in plastic windows is a very effective method. Because the most noisy person is often the high-pitched part, and the high-pitched sound is transmitted in a straight line, most of the reflections can be made with glass. Insulating glass can be used to make the non-reflective part use up. But pay attention to the profiteers selling untreated double glazing as insulating glass.
3, through the use of thick curtains can consume some of the sound energy, is also a relatively simple method, of course, is not a very effective way.
4, for the vibration of these bass and bass, we can use carpets, fabrics and even suction (sept) sound cotton, etc. to reduce their impact on the interior. Adding pads at the foot of the bed can also reduce the vibration. At the same time, the use of palm pads in mattresses is better than spring mattresses. Of course, hard bed boards are much less.
5. Some houses now use lightweight bricks (hollow bricks) as exterior walls. These materials have poor sealing performance. If you are on the edge of the road and you have a great influence on you, you can also make a wooden square on the wall of the road ( Light steel) Fill the gypsum plaster board with a layer of sound-absorbing (separating) sound-absorbing cotton, and then use a decorative surface such as a wallpaper (of course, the surface may be treated with ordinary wall paint).
6. Of course, no matter how you do sound insulation, don't forget about proper ventilation. A too closed environment is not as healthy as sleeping. To prevent noise on the side facing the noise, properly maintain the ventilation on the opposite side. Of course, it is not appropriate to ask you to open the window because the noise has a certain degree of reverberation. It may affect the behind you. The building has returned to your building.
In the above approach, we have dealt with the noise on the side of the road. In fact, it is also effective for other noises. But in general, traffic noise is the most important type of noise, so solving traffic noise also solves other noise. Of course, some noises such as piling, but not long-term, can only be resolved through complaints from agencies like the Environmental Protection Agency. After all, the strength of the piling sound is too great, and the general sound insulation measures are more difficult to prevent. In fact, we did not. It is necessary to do acoustic decoration standards for the auditorium to prevent short-term noise.
On the other hand, noise should also be taken into account when purchasing a house. Observe the noise environment of the house to be purchased at different times and determine the extent of the impact based on your actual situation. For example, most of the old fires will be late nights and nights. I will never choose a house near a school or a vegetable market, because I don't like to listen to the radio and eye exercises that come out of the tweeters, but work early for mornings and mornings. There is no such thing as a family, because when the horn sounds, the family has gone to work.
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