ON This invention relates to a single or multilayer sound transmission board for use in construction of the partition walls, ceilings or floors of buildings and as soundproof panel for aircraft engines or any place where noise reduction is required. A multilayer composite board (10) comprises layers (11) whose thickness determined by convergence of two functional dependences of a weighted sound reduction index Rx or sum of Rx and spectrum adaptation term Ctr from the surface mass and the critical frequency, wherein the critical frequency of the layer equals to or exceeds the threshold of 4000 Hz. The layers of the multilayer board are lightly fixed together mechanically by screws or by gaskets or suitable adhesive materials, providing layer by layer sound wave propagation through the board. 25 25 26 25 Figure 2
IMPROVED SOUND TRANSMISSION LOSS BOARD The improved acoustically resistant composite board
2016-06-23
Patent
Electronic Resource
English
Production method of high-temperature-resistant sound-insulation composite board
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