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A platform for research: civil engineering, architecture and urbanism
SOUND ABSORBING MATERIAL
PROBLEM TO BE SOLVED: To provide a sound absorbing material which is thin and has excellent sound absorption characteristics in a low frequency range.SOLUTION: A sound absorbing material 100 comprises a low density layer 10 and a high density layer 20. The low density layer 10 comprises an open-cell foam of ethylene-propylene-diene rubber. The sound absorbing material 100 as a whole has an area density of 1.8 kg/mor more. The sound absorbing material 100 has a total thickness of 26 mm or less, while having a sound absorption coefficient of 60% or more with respect to sound of 600 Hz or less.SELECTED DRAWING: Figure 1
【課題】薄型で、かつ、優れた低周波領域の吸音特性を有する吸音材を提供する。【解決手段】吸音材１００は、低密度層１０と高密度層２０とを有する。低密度層１０は、エチレン・プロピレン・ジエンゴム連続気泡発泡体で構成される。吸音材１００の全体の面密度は１．８ｋｇ／ｍ２以上である。吸音材１００は、総厚みが２６ｍｍ以下であり、６００Ｈｚ以下の音の吸音率が６０％以上である。【選択図】図１
SOUND ABSORBING MATERIAL
PROBLEM TO BE SOLVED: To provide a sound absorbing material which is thin and has excellent sound absorption characteristics in a low frequency range.SOLUTION: A sound absorbing material 100 comprises a low density layer 10 and a high density layer 20. The low density layer 10 comprises an open-cell foam of ethylene-propylene-diene rubber. The sound absorbing material 100 as a whole has an area density of 1.8 kg/mor more. The sound absorbing material 100 has a total thickness of 26 mm or less, while having a sound absorption coefficient of 60% or more with respect to sound of 600 Hz or less.SELECTED DRAWING: Figure 1
【課題】薄型で、かつ、優れた低周波領域の吸音特性を有する吸音材を提供する。【解決手段】吸音材１００は、低密度層１０と高密度層２０とを有する。低密度層１０は、エチレン・プロピレン・ジエンゴム連続気泡発泡体で構成される。吸音材１００の全体の面密度は１．８ｋｇ／ｍ２以上である。吸音材１００は、総厚みが２６ｍｍ以下であり、６００Ｈｚ以下の音の吸音率が６０％以上である。【選択図】図１
SOUND ABSORBING MATERIAL
吸音材
KAWAMOTO YUSUKE (author) / MAIKAWA HIDETOSHI (author) / OTSUKA TETSUYA (author) / OBARA TOMOUMI (author)
2016-07-07
Patent
Electronic Resource
Japanese
IPC:
G10K
Tonerzeugungsvorrichtungen
,
SOUND-PRODUCING DEVICES
/
B32B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
,
Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse
/
E04B
Allgemeine Baukonstruktionen
,
GENERAL BUILDING CONSTRUCTIONS
SOUND-ABSORBING OUTER COVERING MATERIAL AND SOUND-ABSORBING MATERIAL
| European Patent Office | 2018