MULTILAYERED SOUND ABSORPTION MATERIAL

To provide a multilayered sound absorption material that has a high effect of absorbing a wide range of sounds including low frequency sounds.SOLUTION: A multilayered sound absorption material A has a first layer 1 composed of a permeable material, a second layer 2 that is greater in flow resistance...

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Bibliographic Details
Main Authors MURASE MAO, KOSUKEGAWA YOTA, NAKAJIMA TOMONORI
Format Patent
LanguageEnglish
Japanese
Published 02.09.2021
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Summary:To provide a multilayered sound absorption material that has a high effect of absorbing a wide range of sounds including low frequency sounds.SOLUTION: A multilayered sound absorption material A has a first layer 1 composed of a permeable material, a second layer 2 that is greater in flow resistance and smaller in thickness than the first layer 1 and is composed of a permeable material, and a third layer 3 that is greater in flow resistance and smaller in thickness than the second layer 2 and is composed of a permeable material. The first layer 1, second layer 2 and third layer 3 are laminated in the order of the first layer 1, second layer 2, and third layer 3, and the total thickness is 10 mm or more and 50 mm or less.SELECTED DRAWING: Figure 3 【課題】低周波数の音を含む広範な音に対して高い吸音効果が得られる積層吸音材を提供する。【解決手段】積層吸音材Aが、通気性材料からなる第1の層1と、第1の層1よりも流れ抵抗が大きく厚さが小さい通気性材料からなる第2の層2と、第2の層2よりも流れ抵抗が大きく厚さが小さい通気性材料からなる第3の層3と、を有し、第1の層1と第2の層2と第3の層3とが、第1の層1、第2の層2、第3の層3の順番で積層されており、総厚さが10mm以上かつ50mm以下であることを特徴とする。【選択図】図3
Bibliography:Application Number: JP20210014431