Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SOUND ABSORPTION MATERIAL
To provide a sound absorption material which can enhance sound absorption effect in a low frequency range to a middle frequency range without increasing thickness of the sound absorption material.SOLUTION: The sound absorption material is substantially consisting of an urethane foam 1 and fine particles 2 contained in the urethane foam 1. An average cell diameter a (μm) of the urethane foam 1 and an average particle diameter b (μm) of the fine particles 2 satisfy relations shown in the following formulas (1) and (2), a part or all of the foam cell of the urethane foam 1 has fine particles 2 so as to form a bell-shaped structure, and the air flow resistance value of the sound absorption material is between 30000 and 100000 N s/m. b/a=0.17 to 0.38 ...(1), b≥100 ...(2)SELECTED DRAWING: Figure 1
【課題】吸音材の厚みを増やすことなく、低周波数領域〜中周波数領域の吸音効果を高めることができる吸音材を提供する。【解決手段】ウレタンフォーム１と、ウレタンフォーム１に内在する微粒子２とから実質的になる吸音材であって、ウレタンフォーム１の平均気泡セル径ａ（μｍ）と微粒子２の平均粒子径ｂ（μｍ）とが、下記の式（１）および（２）に示す関係を満たすとともに、ウレタンフォーム１の気泡セルの一部ないし全部に微粒子２が内在して鈴状構造を構成し、上記吸音材の空気流れ抵抗の値が３００００〜１０００００Ｎ・ｓ／ｍ4である。ｂ／ａ＝０．１７〜０．３８……（１）、ｂ≧１００……（２）【選択図】図１
SOUND ABSORPTION MATERIAL
To provide a sound absorption material which can enhance sound absorption effect in a low frequency range to a middle frequency range without increasing thickness of the sound absorption material.SOLUTION: The sound absorption material is substantially consisting of an urethane foam 1 and fine particles 2 contained in the urethane foam 1. An average cell diameter a (μm) of the urethane foam 1 and an average particle diameter b (μm) of the fine particles 2 satisfy relations shown in the following formulas (1) and (2), a part or all of the foam cell of the urethane foam 1 has fine particles 2 so as to form a bell-shaped structure, and the air flow resistance value of the sound absorption material is between 30000 and 100000 N s/m. b/a=0.17 to 0.38 ...(1), b≥100 ...(2)SELECTED DRAWING: Figure 1
【課題】吸音材の厚みを増やすことなく、低周波数領域〜中周波数領域の吸音効果を高めることができる吸音材を提供する。【解決手段】ウレタンフォーム１と、ウレタンフォーム１に内在する微粒子２とから実質的になる吸音材であって、ウレタンフォーム１の平均気泡セル径ａ（μｍ）と微粒子２の平均粒子径ｂ（μｍ）とが、下記の式（１）および（２）に示す関係を満たすとともに、ウレタンフォーム１の気泡セルの一部ないし全部に微粒子２が内在して鈴状構造を構成し、上記吸音材の空気流れ抵抗の値が３００００〜１０００００Ｎ・ｓ／ｍ4である。ｂ／ａ＝０．１７〜０．３８……（１）、ｂ≧１００……（２）【選択図】図１
SOUND ABSORPTION MATERIAL
吸音材
SUZUKI YASUO (Autor:in) / HIBINO TOMOSHIGE (Autor:in) / ITO KUNIO (Autor:in) / ITO MITSUO (Autor:in) / KITAMURA SHUKA (Autor:in) / KANEDA KOKI (Autor:in)
09.01.2020
Patent
Elektronische Ressource
Japanisch
IPC:
G10K
Tonerzeugungsvorrichtungen
,
SOUND-PRODUCING DEVICES
/
B60R
Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen
,
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
/
E04B
Allgemeine Baukonstruktionen
,
GENERAL BUILDING CONSTRUCTIONS
Sound absorption material and method of manufacturing sound absorption material
| Europäisches Patentamt | 2015