#1 2018-03-06 08:27:27

xiao1235
Banned
Registered: 2017-12-20
Posts: 1,384

be noise building surface, underground

<p>between the air density and the air density, the higher the density of the material (which is much lower than the density of the air except the vacuum) Can be regarded as soundproof material. The higher the density, the better the sound insulation. A sheet of such material, called a baffle. Sound insulation board Not all the frequency of sound can be blocked, the object has an inherent resonant frequency, close to </p>
<p>the object's resonant frequency of sound, sound insulation panels significantly reduce the noise effect. Sound insulation board has the difference between the air sound and vibration sound. Air sound insulation board, that is blocking the sound is spread in the air sheet. Vibrating sound insulation panels are panels and systems that block the sound that is propagating in rigid components such as reinforced concrete </p>
<p>monolithic houses. Sound insulation board type Building sound insulation engineering classification, according to the location of sound insulation, noise method, the use of sound-proof materials and varieties to be classified. 1, according to the classification of civil engineering categories, can be divided into two types of noise insulation of buildings and structures. 2, according to the location of noise classification, </p>
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