1. Insulating glass
Insulating glass is an energy-saving glass invented more than a hundred years ago. It reduces heat transfer and saves energy through the dry air layer in the middle. At the same time, it has good sound insulation performance. Generally speaking, the sound insulation of the 6+12A+6 insulating glass we commonly use can reach 28 decibels.
2. Vacuum glass
Vacuum glass is also a glass product invented for energy saving and consumption reduction. It reduces heat transfer through the vacuum layer between two layers of glass. Because the vacuum layer also has the function of blocking sound wave conduction, more and more occasions will try to use vacuum glass for sound insulation. The sound insulation of the commonly used 5+0.12V+5 vacuum glass can reach 33dB, which is a very good result. If it is a special spherical vacuum glass, the sound insulation can reach a terrifying 85dB, but because of the shape of the product, it cannot be widely promoted, so we only compare the data of flat glass.
3. PVB laminated glass
Laminated glass, as a kind of safety glass, is increasingly becoming a commonly used glass product in buildings. It has good safety performance. It will not splash and scatter when it is broken by impact, and it will remain as a whole, which can better protect personal safety. This is also the original intention of people to invent and use this kind of glass. However, people soon found that 6+1.52+6 laminated glass made of PVB material can effectively reduce noise above 35 decibels, and can be produced and installed on a large scale. Therefore, PVB laminated glass can be widely used in high-rise buildings and curtain wall glass. However, PVB laminated glass has its natural disadvantages as soundproof glass. For example, when the temperature is below 10 degrees Celsius, the thick PVB film will harden, and the corresponding sound insulation effect will also be reduced. PVB glass must be sealed with silicone glue; otherwise, there will be edge bubble marks and water bubble marks. After a long time of exposure to the sun and rain, it will be delaminated and the glass will be scrapped.
4. DEV soundproof glass
DEV soundproof glass is a type of soundproof glass that has appeared in the past decade. It uses the characteristics of different vibration amplitudes between glass sheets in sound waves and uses the ductile DEVA intermediate film to tightly laminate glass sheets with different resonance coefficients. When sound waves pass through the soundproof glass, the glass sheets will resonate with different amplitudes. These resonances with different amplitudes cannot complete the vibration in unison. Under the action of DEVA soundproof damping film, stretching, squeezing, friction and heat are generated, and the kinetic energy of sound waves is converted into heat for external transmission, thereby achieving the purpose of sound insulation. At present, the sound insulation of DEV13 soundproof glass is as high as 42dB, which is equivalent to 5+1.52PVB+5+1.52PVB+5 three-layer PVB laminated glass, but it is thinner and lighter, and the cost is also comparable.
5. Prism Window
Prism Window is a high-end soundproof glass combination introduced to the market in the past two years. It uses three pieces of DEV soundproof glass arranged at a certain angle, which can change the propagation direction and reflection direction of sound waves. In the process of using DEV glass to slow down the absorption and conversion, it also uses different changes in glass angles and increases the path of sound wave transmission to isolate noise more effectively. This type of glass generally appears in groups and is used as a window or observation window. The M-type prism window, composed of four layers of DEV soundproof glass ,has a sound insulation of up to 82 decibels. It can be widely used for observation windows in recording studios and anechoic rooms.
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