<p>cotton in the middle will be more soundproof than the solid wooden door. Two, look at the wooden facade, plywood thickness, surface board, the more thick, the better the sound insulation effect. General wooden door surface board should use 8mm thick. The thickness of the laminates is also better, but the cost will increase. But: iron fire door surface layer iron sheet 3mm thick, sound insulation effect is also good. Three, the doors of the flatness of the flat wooden </p>
<p>doors, Mentao combination with better, but no matter what the structure. As long as the deformation of wooden doors, sound insulation is certainly not possible, air leakage. Four, there is a slight expansion of rubber quality professional, expansion rubber quality between the same door wall, this point is not good it will seriously affect the sound insulation. Note: in fact, the door and window industry is the same as the fire door, there is a national level, </p>
<p>rather than a single content defined. The concept of sound insulation and sound absorption. The principle is sound depends on the quality or material density (time, when the iron door unit area total weight less than its sound than wooden doors), and sound absorption depends on the surface area of the material and fine surface roughness (space rock wool, mineral wool, and the foam is not insulation sound-absorbing material). The above content is small house </p>
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