How to install the windows at home to make the sound insulation really effective? Why do some people spend tens of thousands of dollars but still can’t stand the noise of the road?

The window is not a very popular topic in the decoration, its style is not much, there is not much choice。

But it’s not until you use it that you can feel its impact on your life.

Why can’t my window stop the noise of the road? Why can close the window to still can appear summer to leak rain winter to leak wind?

Here is a detailed analysis of your window problem.

Why can’t the noise of the road be insulated?

If there is a road outside the window, the main noise sources are mainly the sound of whistle, the sound of the friction between the tire and the ground, the sound of the car engine and the exhaust pipe running.

If there is a community outside the window, the possible noises are the loud music of the square dancing mother, the sound of children playing, the barking of dogs, or the school radio.

The sound in the community and the whistle on the road are high-frequency noises that are easy to be shielded, but the road noise is the low-frequency noise that you can’t hide.

There are two factors that affect the amount of noise: occlusion and distance.

The more obstructions and the further away from the noise source, the smaller the amount of noise.

According to research, buildings near the road have the most noise on the middle floor, which gradually decreases towards the top and bottom floors.

In the neighborhood where buildings are sheltered, the noise on the top floor is the largest, and the amount of noise decreases from top to bottom, because the higher the floor, the fewer the obstructions, and the larger the noise.

Knowing this, when buying a house, you can choose the appropriate floor based on the distance from the noise source, the number of surrounding buildings, and the coverage of greenery (which can also be considered as a block).

The noise in the middle floor of buildings near the road is the most

Long term exposure to low-frequency noise will make children’s hearing insensitive.

In order to achieve the sound insulation effect, we need to cut off the medium of sound transmission, which is the “sound bridge” in the acoustic environment of buildings.

Under the premise that the windows are well sealed, the air medium in the windows and the metal medium contained in the windows can still help the sound propagation

So, isn’t vacuum glass the best choice?

After the air in the vacuum glass is removed, in order to prevent the two glasses from being forced together by the atmospheric pressure, a metal support is installed between the two layers of glass to bear the pressure of the atmospheric pressure, and some inert gas will be injected in the middle.

Without air medium, sound can still be transmitted through metal supports in vacuum glass.

Vacuum glass has a very high requirement for the production process. If the process is not qualified, it will leak into the air in two or three years, and gradually become hollow glass.

Hollow glass is actually a kind of heat insulation glass. The original production process is to extract all air from the middle of two layers of glass, inject inert gas, and then seal the whole glass.

At present, there are many bad businesses, and the manufacturing process omits the previous steps, leaving only two layers of glass, the air in the middle.

Hollow glass is very popular because of its good heat preservation performance. Sometimes it can be sold as “sound proof glass”.

However, hollow glass and vacuum glass can only block high-frequency noise, and they are helpless for low-frequency noise.

At present, the sound insulation glass that can be purchased in the market at the same time to isolate the noise of medium, high and low frequency is actually laminated glass.

PVB membrane in the middle of laminated glass can effectively filter low-frequency noise. According to different use environment, there are two layers and three layers.

There are high floors and no buildings around. If there is an airport or railway station nearby, three-layer laminated glass can be used.

Double laminated glass can be used for those with lower floors, buildings around and close to the intersection.

Besides glass, we also talk about profiles (window frames).

The sound insulation effect of aluminum doors and windows for bridge breaking is not as good as that of plastic steel doors and windows, because the metal content of aluminum for bridge breaking is much higher than that of plastic steel.

The sound insulation effect of plastic steel doors and windows with the same thickness will be 5-15 decibels stronger than that of the broken bridge aluminum.

In addition, the interior of the plastic steel window is a thick wall and multi cavity. When the sound propagates, it will reflect back and forth in the multi cavity for many times, and some of it will be consumed, so the sound insulation effect will be greatly improved.

In terms of opening mode, smooth Sliding requires gap and space, so sliding doors and windows can not guarantee air tightness, and its sound insulation and heat preservation effect can not be compared with casement opening.

Then install the sealing strips that are needed for sound proof glass, and you will find it more and more difficult to push the windows open.