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SOUND ABSORPTIVE SHEET WITH MICRO-RESONANCE STRUCTURE, METHOD FOR MANUFACTURING SOUND ABSORPTIVE SHEET WITH MICRO-RESONANCE STRUCTURE, AND SOUNDPROOF PANEL USING METHOD
SOUND ABSORPTIVE SHEET WITH MICRO-RESONANCE STRUCTURE, METHOD FOR MANUFACTURING SOUND ABSORPTIVE SHEET WITH MICRO-RESONANCE STRUCTURE, AND SOUNDPROOF PANEL USING METHOD
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机译:具有微共振结构的吸声板,具有微共振结构的吸声板的制造方法以及使用该方法的防音板
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摘要
Disclosed are a sound absorptive sheet capable of improving the performance of sound absorption up to a low frequency range based on a micro-resonance principle by including a micro-resonance structure, to a method for manufacturing the sound absorptive sheet, and a soundproof panel using the method. According to the present invention, the sound absorptive sheet comprises multiple uneven patterns having a convex part and a concave part, on one surface of a porous base material. The area ratio of the concave part, determined by formula 1 below, is 40 to 99%. The area corresponding to the concave part has lower air penetrability than the area corresponding to the convex part. [Formula 1] Area ratio of concave part = [area of concave part]/[area of porous base material].;COPYRIGHT KIPO 2014
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