CONTROL METHOD OF SOUND ABSORPTION CHARACTERISTICS OF SOUNDPROOF MATERIAL
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United States of America
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Issued Date -
Mar 10, 2022
app pub date -
Dec 2, 2019
filing date -
Dec 2, 2019
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Abstract
A control method of sound absorption characteristics of a soundproof material is provided to change the sound absorption characteristics of the soundproof material while equally maintaining constituent materials, total thickness, and total weight of the soundproof material. The soundproof material includes: a surface cover layer composed of a fiber material; a back-surface layer laminated onto the surface cover layer, and composed of a porous material with voids interconnected with each other; and one or more joining layers laminated between the surface cover layer and the back-surface layer, each joining layer being composed of a joining material, having a total joint area percentage of less than 100% with respect to the entire contact surface between the surface cover layer and the back-surface layer. The sound absorption characteristics are changed by changing the areas of the joining layers.
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