Is it true that the higher the high rise house, the louder the noise?

Noise, why is it louder with higher floors?

According to the Pythagorean law, the upper and lower floors are within double the distance from the noise, so the noise increases as the floor increases.

The level of noise should be judged according to the type of noise source and the environment around the detection point. From a professional point of view, according to the principle of sound wave transmission, the farther away from the source of the noise, the lower the noise. However, in real life, if there is an obstruction around the lower floors, some of the noise can be blocked to a certain extent.

In addition, the noise level will vary depending on the time, location, and surroundings. ”

For high-rise residents, the impact of vibration is constantly attenuated, but sound is transmitted in the form of sound waves, and noise is noticeable when the height of a certain floor is exactly an integer multiple of the wavelength of the noise sound. This is because there are no buildings around the high-rise building, and the high-rise is completely exposed to the three-dimensional propagation of sound waves, so the noise is loud.

Han Maowei, deputy director of the Institute of Architectural Sound and Light at Chang'an University's School of Architecture, said that the higher the floor, the louder the noise, is not entirely accurate.

Under normal circumstances, the ground floor of high-rise residential buildings has barriers such as walls or green belts, which receive direct sound when vehicles are driving, and there is less reflected sound; The middle and upper floors receive more reflected sound and the superposition of direct sound makes the noise louder, while the top layer is not always the loudest.

Han Maowei, deputy director of the Institute of Architectural Sound and Light, School of Architecture, Chang'an University: There is a certain barrier to obstruction, and the middle and high basically have a small impact, but if there is a large square in front, at this time, we can also see from our test results that the higher the floor height, the more reflected sound may be.

At this time, the noise, especially sometimes, between the high-rise building, between multiple high-rise buildings, at this time, it forms a kind of drum effect, the sound is reflected back and forth, and finally, the higher the place, the greater the noise value.

Floors 5 to 24 are the noisier.

A study by experts from the Nanjing Environmental Protection Bureau found that noise propagated upwards, with high-rise residential buildings being the noisiest between 30 and 70 meters. In addition to the fact that the green belt and street trees can reduce the noise, but also because the low floor only receives the noise at close range, and the higher the floor, the wider the range of the received noise, and the long-distance traffic noise can be transmitted to the high-rise.

The test of the monitoring personnel found that above the 5th floor, the noise decibels will increase with the increase of the floor, and when the floor is higher, the noise will decrease again. Generally speaking, in high-rise buildings, floors 5 to 24 are the most noisy, with the noise rising most from floors 11 to 22, and quieter floors above 30 floors. If it is a 26-storey building, the 20-22 floors are the noisiest.

The above content refers to Phoenix.com - don't think that if you live high, it will be quiet, and the 5th to 24th floors are the most noisy.

If the house is on the 6th or 7th floor, the noise may be relatively large, but if the number of floors of the house is further increased by more than a dozen floors or more than 20 floors, the noise must be small, because there is no noise and no sound circle above, so the noise is relatively small.

The noise of the building does need to be paid more attention, because the existence of noise may affect people's rest and sleep, so we must pay attention to the protection of noise, you can choose the terrain when you choose to buy a house, if the local is mainly to live, then the noise is relatively small, which is a better other aspect can increase the noise prevention equipment, such as double glazing, soundproof glass, are a good choice.

The more noisy the house is as the floor increases, the most important thing is that the location where you are located is noisy, if it is in a quiet community, regardless of whether the floor is high or low, the noise is generally smaller.

The higher the floor, the louder the noise Why?

Because we perceive the strength and magnitude of sound, it is mainly related to the energy carried by the sound wave itself, the distance of the sound source, and the propagation characteristics of sound in the air.

According to the analysis of the principle of sound wave transmission, the farther away from the source of noise, the lower the noise, and usually there will be an attenuation process for the propagation of noise in the air.

However, there are exceptions, such as the long cycle of the building itself, and the disturbance of the surrounding greenery and wind speed, which can occur.

There are also cases where the noise becomes louder as the floor rises, which is related to the different environment of the building and the influence of wind noise.

Blocked or absorbed by the greening and buildings on the ground floor, the noise is reduced after repeated refraction and reflection, while the high-rise is completely exposed to the three-dimensional propagation of sound waves, and the noise of the high-rise is larger.

In addition to traffic noise, residents living in high-rise buildings are often affected by wind noise, and sometimes there is a "howling" sound of wind.

The saying that "the higher the floor, the louder it is" is not true. If it is a building facing the street, the noise of the lower floors may be a little louder than that of the upper floors, but the noise is reduced to a certain extent due to the presence of greenery and other facilities in the community. Experts say that the noise sources may vary depending on the height of the floor, with the lower floors likely to be subject to noise such as vehicle horns, while the higher floors may also be subject to wind-generated noise.

There is no scientific basis for the claim that the higher the floor, the louder the noise. Although the noise of some buildings increases with the increase of floors, the relationship between noise size and floor height cannot be generalized, and it needs to be analyzed according to the regional environment around the building (such as whether there are overpasses, factories, whether they are in the roadway, whether there are barriers, etc.), and the specific situation of the noise source.

The occurrence of noise peaks of high-rise buildings on both sides of the road is also related to various factors such as the pavement condition of the adjacent roads, the type of vehicles passing through, the driving speed, the height of the buildings on the opposite side of the road, and the building form, which is difficult to accurately quantify.

There has been an environmental monitoring agency, which selected small high-rise buildings and high-rise buildings as monitoring objects, and found that the noise peak of small high-rise buildings appeared about 5-8 floors, and gradually weakened above 8 floors. The peak noise of high-rise buildings occurs on about 10 floors, and the noise value difference between each floor is small, generally only 1-2 decibels.

Knowledge: Green belt buildings can reduce some of the noise.

The composition of urban noise is complex, and as the noise travels through the air, it gradually decreases with increasing distance. However, when noise encounters obstacles during propagation, it will form superposition or attenuation.

Factors that affect noise superposition or attenuation include barriers, barriers, walls, green belts, and so on. For example, if there is a green belt or other buildings in front of the lower floors of a high-rise building, the impact of noise can be mitigated to a certain extent.

For the top floor of high-rise buildings, according to the law of distance attenuation, the impact of urban ground traffic noise on it is very limited.

The higher the floor, the louder the noise, or the higher the floor, the quieter the noise, everyone has different opinions. So what are the factors that usually affect the noise level? What is the connection between floors and noise? Next, I will briefly introduce to you whether the higher the floor, the louder the noise.

1. There is no scientific basis for the higher the floor, the louder the noise. Because the noise of the community is usually related to the surrounding environment of the building, we all know that the real estate on the street is usually more affected by the noise than the real estate inside the community. According to a study by the relevant environmental monitoring agency, the noisy floors of small high-rise buildings are usually 5-8 floors, while the floors of high-rise buildings with loud noise are about 10 floors.

2. Why is the noise on the middle floor louder? Because the buildings in the community will be built around the green belt. Low-rise houses are separated by green belts, which makes them less noisy.

In high-rise buildings, the noise of high-rise buildings is not as high as that of intermediate floors because the sound travels through the air, which weakens with the increase of distance. The middle floor not only does not have a shelter to block the noise, but also increases the noise as the area of the noise source increases.

3. However, many residential areas are high-rise buildings nowadays, and most of the buildings are highly similar to each other, and the floors can play a role in blocking each other, resulting in noise not changing greatly with the increase of floors. In order to avoid being affected by noise, when buying a house, try not to buy a house near the roadside, viaduct, etc. If the noise in your home is high, you can choose to install sealed glass, wallpaper on the wall, and use thick fabric curtains to reduce the impact of noise.

Because in daily life, people will feel that high-rise housing, especially those adjacent to the street, is noisy and different from what people usually think. According to common sense, people always think that the noise on the ground, the horn of traffic, the grinding of tires, etc. Rooms above the ninth floor are farther away from the noise source than rooms below the third floor, so noise should be lower.

However, the opposite is true. Why is that?

This phenomenon has been investigated by hygienists. According to the on-site monitoring results of high-rise residential buildings, the average noise on the 11th floor is decibels, and the average noise on the second floor is decibels. On the contrary, the noise on the top floor is louder than that on the ground floor, which is somewhat similar to the principle of standing at high energy and seeing far.

One can see far from a great height as the view is not obstructed by many obstacles. The same goes for sound. Sound waves travel in the air in the form of longitudinal waves, traveling in all directions at a speed of 344 meters per second.

On the upper floors of the building, there are no obstacles, so many sounds can be transmitted directly, so it is even more noisy. In the lower floors of the building, although it is close to the streets and roads, the sound is easily blocked and absorbed by obstacles on the ground, so the noise is lower than that of high-rise residential buildings.

When the noise in the house reaches more than 65 decibels, the noise is unbearable.

The higher the floor. Feel the louder the noise. Explain that the windows and walls of your home are not soundproofed. Or maybe there are large machines in operation near your home. Or maybe it's someone upstairs. Renovation can cause loud noise.

Many people believe this statement, because the lower the floor, the closer the ground is, and the ground is the main thing of noise. It's like the sound of children playing, the sound of cars starting, the sound of malls selling, and so on. In fact, this statement is relatively one-sided, and some people think that the higher the floor, the louder the noise, because the high-rise is empty and more sensitive to noise, so there is also a view that the higher the floor, the louder the noise.

This statement is actually true. However, to be specific, noise is affected by various factors, and there are many types, and the noise formed by different noise sources also has different influence ranges, so it still depends on the specific situation.

Because the wind in the high places is relatively loud, a lot of noise is blown up, and then it becomes louder.

"It's a mistake to think that the higher the floor, the farther away from the ground, the less noise you have, and if you choose a floor that is bigger than 20 floors, you have to be careful, it can be very noisy. This is from a 23-story resident complaint, when I first chose the house, I listened to others, he said to me: rest assured to choose, we don't say this floor, absolutely no noise, so far from the ground, and not blocked, a good direction for viewing!

Then I chose 2....

The noise from the middle or lower floors of the building is partially blocked by the other low-rise buildings, so the noise of the lower and middle floors is not as loud as that of the upper floors.

The idea that the higher the floor, the farther away from the ground, the less noise there is, is wrong

Less noise on the 1st-4th floors, e.g. villas

The noise from the 5th to 10th floors will be a bit loud, and the main noise will come from the vehicles on the ground

The 11th-20th floors will be quieter and have a moderate distance from the ground

This floor is generally moderate, with less dust and less noise. If you can ask the developer to use good soundproofing materials, soundproof glass, it will be really quiet. But on the 23rd floor, there is really no way, there is no sound after the windows on the 12th floor of the seventh floor are closed, and in my house, the windows can't block the sound of the car.

Noise, why is it louder with higher floors?

Noise, why is it louder with higher floors?

In the absence of sudden noise, viaducts and other factors, the noise of each floor of the building is not very different, and the noise level will vary depending on the time, location and surrounding environment.

My family lives on the 24th floor, and to be honest, the outside sound is really not very small, and I don't think the noise can be judged by the height of the floor.

Or if you live on the first floor, you are used to hearing the outside sound, so you don't feel anything, but if you live on the upper floor, the sound seems to be similar, and if you open the window, the sound will become louder.