We always encounter various kinds of noise in our daily life, which seriously affects the quality of human life. Urban noise is mainly divided into living noise, traffic noise, equipment noise and construction noise. Building enclosures such as doors, Windows and walls have the effect of reducing these noises. In architectural acoustics, the sound of 200-300Hz or below is generally called low frequency sound, the sound of 500-1000Hz is called medium frequency sound, and the sound of 2000-4000Hz or above is called high frequency sound. The sound insulation performance of the wall of the general building is better than that of the window, and the majority of the area of the window is glass, so the sound insulation performance of glass is to solve the bottleneck problem of the noise of life.
At present, there are many researches and products about sound insulation Windows. These products have good sound insulation performance for high frequency, but their sound insulation effect for this frequency band is not very satisfactory due to their strong penetration ability of middle and low frequency noise. In the frequency range that human ears can hear, the low and medium frequency noise is the most common -- the noise of cars on the highway, the noise of rail transit, etc., so it is difficult and important to improve the sound insulation performance of glass to the low and medium frequency.
We know that sound is a kind of wave, which is generated by the vibration of objects, propagated through the medium and can be perceived by the auditory organs. As sound is a kind of wave, frequency and amplitude become the important properties to describe the wave. The size of frequency corresponds to what we commonly call pitch, and amplitude affects the size of sound. Sounds that the human ear can hear range in frequency from 20 to 20, 000Hz. Fluctuations above this range are called ultrasonic waves, while those below this range are called infrasound waves. When the external sound wave is projected on the building envelope (such as the wall), due to the alternating action of the incoming sound wave, in addition to the reflection phenomenon on the surface, the wall will also produce forced vibration like a diaphragm. There are forced bending waves propagating along the wall, but also cause the air inside the wall to make the same vibration, so that the sound will penetrate through. Because of the vacuum barrier inside the vacuum glass, the direct transmission of sound is not supported by the medium, so it is reduced to the greatest extent.
Vacuum insulated glass has higher sound insulation in low frequency band, mainly because the four sides of vacuum glass are rigid connection, strong deformation resistance and stiffness. In terms of sound insulation performance, vacuum glass avoids the shortcomings of insulating glass and laminated glass. If vacuum glass is used, only a single silver Low-E can easily meet the requirements, and the visible light transmittance is greatly improved, and the material thickness is greatly reduced. On the other hand, the use of wall, window frame profiles and window frame sealing materials can be reduced. This is what the concept of green building and green building materials advocates. Therefore, vacuum glass can be said to be a tailor-made supporting material for the "Demand Standard", which will be widely used in the future when green buildings are popular.
vacuum Insulated glass has a vacuum layer, and there is no conduction heat transfer, convection heat transfer, or sound propagation in vacuum environment. Therefore, vacuum glass has outstanding thermal insulation performance, but also has good sound insulation performance. The advantages of vacuum glass used as window glass are also reflected in its small total thickness and small occupied space. Especially for window glass renovation projects, the sound insulation and heat insulation performance of Windows can be improved without changing the profile structure, which fully meets the requirements of green buildings. Therefore, in order to create a comfortable and livable living environment, vacuum glass is the choice to kill many birds with one stone.
Zerothermo focus on vacuum technology for more than 20 years, our main products : vacuum insulation panels based on fumed silica core material for vaccine, medical, cold chain logistics, freezer, integrated vacuum insulation and decoration panel, vacuum glass, vacuum insulated doors and windows. If you want to learn more information about Zerothermo vacuum insulation panels, please feel free to contact us, also you are welcome to visit to our factory.
Sale Manager: Mike Xu
Phone :+86 13378245612/13880795380
E-mail:mike@zerothermo.com
Website:https://www.zerothermovip.com
Post time: Dec-09-2022
