First, which floors are quieter?
I believe we have all learned in school that sound propagates upward, so some floors are higher but the noise will be louder. Usually the noise of high-rise residential buildings is between 30 meters and 70 meters. Low floors have low noise, not only because green belts and street trees can reduce noise, but also because low floors only receive short-range noise, while higher floors receive a wider range of noise, and long-distance traffic noise can be transmitted to high floors.
In our daily life, we can easily find that many people prefer to live in tall buildings. These people think that high-rise buildings are far away from roads and are less affected by traffic noise such as traffic flow. In fact, the environmental protection department found that the noise decibel of high-rise buildings is small at both ends and large in the middle, and the noise on the 5-24 floors is loud, and it becomes quiet above the 30 th floor. The forms of noise pollution suffered by high-rise buildings and low-rise buildings are not the same. For the lower layer, the noise sources are vibration and sound. For high-rise residents, the influence of vibration will be weakened, but the sound is transmitted in the form of sound waves. When the height of a floor reaches an integer multiple of the wavelength of noise sound waves, the noise will be very obvious.
Second, how to avoid noise when choosing a house?
1, away from the main road
Many projects will be promoted because they are close to main roads. It seems that the traffic is convenient, but the noise hazard also follows. When choosing a house, you should keep a proper distance from the noise source, and it is the main road, which needs special attention. The low-frequency noise of cars on the main roads in expressway is very penetrating, and people are very sensitive and excited about this kind of low-frequency noise, especially the low hum of trucks pulling muck in the middle of the night and the hum of buses starting, which is very annoying. Ordinary windows can't isolate similar noise at all.
Step 2 avoid houses facing the street
Houses facing the street are seriously affected by noise. Because many shops open early and close late, the noise can be imagined. Don't ignore this, because even a small road may develop into a vegetable market. Open space and a large area of green belt, buildings on the edge of the community, houses on the roadside, etc. It's all noisy areas.
3. Pay attention to the wall thickness
It is not difficult to understand that the thicker the wall of a house, the better the sound insulation effect. If the walls of the house are not thick enough, we will always hear the sound of flushing the toilet upstairs, the crying of the children next door, the voices in the corridor and so on at home. The partition walls of many high-rise buildings are hollow walls, which greatly affects the sound insulation effect. Therefore, when buying a house, I suggest you knock on the wall with your hands. The echo of a solid wall is smaller, and the echo of a hollow wall will vibrate.