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Sound insulation properties and advantages of laminated glass

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Update time : 2023-02-22 14:00:00

When laminated glass is selected as a soundproof window, the volume of laminated glass is subject to the law of mass, that is, surface density (material density and thickness product) determines the size of the overall volume. Those who have learned about laminated glass know that laminated glass is generally composed of two layers of glass and film, with small thickness and large glass density, so laminated glass surface density is large, and its sound insulation performance is ideal.

Laminated glass has anastomosis effect of sound insulation performance. The purpose of noise reduction and vibration control is to find that the acoustic frequency of the matching effect is not in the frequency range of the need for noise reduction. The anastomosing effect of laminated glass appears at about 3000Hz, which is far away from the traffic noise of medium and low frequency. It is the soundproof glass used for ideal busy traffic road at present.

The film in the middle of the laminated glass is equivalent to a damping layer, which can effectively inhibit the vibration of the glass and improve the sound insulation performance of the glass. As is known to all, sound waves strike glass and make glass vibrate to spread noise. Single-layer glass, insulating glass, vacuum glass and laminated glass all vibrate due to the impact of sound waves, and the vibration generates sound. However, the film blocking of laminated glass effectively reduces the vibration of glass.

The better the damping performance of laminated film, the better the overall sound insulation performance of laminated glass (improve 1-3 decibels), especially for the sound insulation performance of middle and low frequency. As far as soundproof glass is concerned, laminated glass has good soundproof performance and long service life. Compared with vacuum glass, laminated glass is a good choice for soundproof Windows.

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