The house is decorated and the room wants to be soundproofed outdoors. What should I do?
What is noise? Simply put, we can understand irregular sound as noise. There are several main sources of urban noise. One is the construction noise, which is staged. The other is traffic noise, which lasts for a long time. The third kind of noise is the noise in our life, such as the noise in entertainment places, the sound of playing mahjong, MTV and so on.
Among these noises, the most difficult one is car noise. Theoretically, the problem of domestic noise can be solved at the same time by dealing with car noise. Of course, low-intensity construction noise can also be solved. However, I can only say that the noise generated by piling is very difficult to deal with at present. Except that they stopped working within a limited time, we can't decorate our home into the sound insulation standard of the audition room.
First of all, we need to understand a basic concept: decibel, which is the unit of sound pressure level (symbol: db). Every time the sound pressure doubles, the sound pressure level increases by 6 decibels. 1 dB is the sound that the human ear can just hear. Generally speaking, sounds below 20 decibels are considered quiet. Of course, generally speaking, sounds below 15 dB can be considered "dead". 20-40 decibels is about a whisper in a couple's ear. 40-60 decibels belong to our normal conversation voice. Above 60 decibels, it belongs to the noisy range. When it reaches 70 decibels, we can think it is very noisy and begin to damage the auditory nerve. Above 90 decibels will damage hearing, and stay in the space of 100- 120 decibels. Unless there is an accident, people will be deaf for a minute. Among them, the noise of cars varies from 80- 100 decibels. Take a car with a noise of 90 decibels as an example. At a distance of 100 meters, noise of 8 1 decibel can still be heard (the above standards will vary according to environmental differences, not absolute values).
The magnitude of traffic noise is affected by the following factors:
1. The higher the traffic volume of vehicles on adjacent roads, the greater the noise. The noise of the main road will definitely be much louder than that of the municipal roads in the community.
2. The higher the speed of the adjacent expressway, the greater the noise.
3. The higher the proportion of heavy vehicles, the greater the noise, such as container trucks (container trucks).
4. The lower the quality of highway pavement, the greater the noise. With the same pavement quality, the noise with speed bumps will be louder than that without speed bumps.
The closer to the road, the louder the noise. When the same heavy truck passes by, the residential building (plane linear distance) at a height of 5.5 meters from the highway at 10 meter will be attenuated by 0.3 dB, at 30 meters by 4 dB, at 50 meters by 6 dB, and at 100 meter by 8.9 dB.
6. At the same distance from the expressway, the higher the floors of ordinary houses, the greater the noise. (At present, there is no upper limit data, and the possibility of weakening after reaching a certain height is not ruled out, but at present, it is generally the case for the top 32 floors. )
7. Those with road noise barriers are lighter than those without noise barriers.
8. The influence of buildings is lighter than that of no buildings.
To solve traffic noise, we have to solve it and see how many kinds of car noise there are. Generally speaking, they can be summarized as follows:
1. The sound of car tires rubbing against the ground. This kind of sound is basically bass, accompanied by vibration. This situation is especially adjacent to the fact that concrete roads are more serious than asphalt roads.
2. The sound of automobile engine, exhaust pipe and automobile transmission system. The greater the horsepower, the longer the car limit and the stronger the noise.
3. The sound of vehicle vibration caused by the impact of car horns, wind resistance and brakes, speed bumps and loads.
1. The best way to deal with noise is to close the window. Whether you have a single window or a double window, sealing is the most important thing. The bearing capacity of a barrel is determined by the shortest sawdust, and the sound insulation effect is determined by the weakest link. From the current technical level, it is the most effective decoration scheme to use plastic steel windows as sealing means. For users who have adopted aluminum alloy, it is necessary to ensure that the aluminum alloy frame sealing strip is intact. Relatively speaking, the sealing performance of aluminum alloy windows is worse than that of plastic steel windows.
The window seal has been solved, and the next step is to make it more sealed. After all, sound insulation is not equal to sealing, but also depends on sealing performance. It is a very effective method to use insulating glass in plastic steel windows. Because the loudest part is often the high-pitched part, and the high-pitched part travels in a straight line, most of it can be reflected by the glass, and the non-reflective part can be consumed by the insulating glass. However, it should be noted that profiteers sell you untreated double glass as insulating glass.
It is also a simple way to use thick curtains to consume some sound energy, but it is certainly not a very effective way.
We can use carpets, cloth and even sound-absorbing cotton to reduce their indoor influence. Rubber pads at the foot of the bed can also reduce vibration. At the same time, mattresses with palm pads are better than Simmons with springs, not to mention hard beds.
5. Now some houses use light bricks (hollow bricks) as the external walls. These materials have poor sealing performance. If your roadside has a great influence on you, you can also make a sandwich of wood square (light steel) and sound-absorbing (thermal insulation) cotton in gypsum board on the wall near the road, and then decorate the surface with wallpaper (of course, you can also treat the surface with ordinary wall paint).
6. Of course, no matter how you do sound insulation, don't forget proper ventilation. A closed environment is as unhealthy as sleeping. The side facing the noise should prevent noise, and the opposite side should be properly ventilated. Of course, you don't necessarily have to open your windows properly, because noisy things have certain repercussions, which may affect the building behind you and spread back to your building.
The above practice is aimed at roadside noise, but it is also effective for other noises. But in general, traffic noise is the most important type of noise, so solving traffic noise will solve other noises. Of course, the noise caused by piling is long-term, but it can only be solved by complaining to the environmental protection bureau and other institutions. After all, the sound intensity of piling is too strong, and general sound insulation measures are difficult to prevent. In fact, it is not necessary for us to set standards for sound insulation and decoration of the audition room in order to prevent short-term noise.
On the other hand, buying a house should also consider noise. Observe the noise environment of the house to be purchased at different times, and determine the degree of influence according to your actual situation. For example, Lao Huo mostly goes to bed late and gets up late, so I will never choose a house near the school or the vegetable market, because I don't like listening to the music of radio exercises and eye exercises from the tweeter, but it doesn't matter to those who get up early and go home early, because when the horn rings, their families have already gone to work.