A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SOUND ABSORPTION MATERIAL
To provide a sound absorption material having sound absorption performance in a wide frequency range including a frequency range around 2 kHz.SOLUTION: The sound absorption material 1 is composed of: a fixing material layer 10 made of a hard material having no continuous penetrating holes; a porous layer 31 made of a porous material formed on the fixing material layer and having continuous penetrating holes, and provided with Helmholtz resonators 23 having neck portions 21 and cavity portions 22; and a skin layer 40 formed on the porous layer. In a neck portion, the porous material is exposed and an inner wall of the cavity portion is covered with a resin layer 25.SELECTED DRAWING: Figure 1
【課題】２ｋＨｚ前後の周波数領域を含む広い周波数領域での吸音性能を有する吸音材を提供する。【解決手段】吸音材１は、連通気孔を有さない硬質材料からなる固定材料層１０と、固定材料層の上に形成され、連通気孔を有する多孔質材料からなり、くび部２１及び空洞部２２を有するヘルムホルツ共鳴器２３が設けられている多孔質層３１と、多孔質層の上に形成された表皮層４０と、からなる。くび部では、多孔質材料が露出しており、空洞部の内壁が樹脂層２５で覆われている。【選択図】図１
SOUND ABSORPTION MATERIAL
To provide a sound absorption material having sound absorption performance in a wide frequency range including a frequency range around 2 kHz.SOLUTION: The sound absorption material 1 is composed of: a fixing material layer 10 made of a hard material having no continuous penetrating holes; a porous layer 31 made of a porous material formed on the fixing material layer and having continuous penetrating holes, and provided with Helmholtz resonators 23 having neck portions 21 and cavity portions 22; and a skin layer 40 formed on the porous layer. In a neck portion, the porous material is exposed and an inner wall of the cavity portion is covered with a resin layer 25.SELECTED DRAWING: Figure 1
【課題】２ｋＨｚ前後の周波数領域を含む広い周波数領域での吸音性能を有する吸音材を提供する。【解決手段】吸音材１は、連通気孔を有さない硬質材料からなる固定材料層１０と、固定材料層の上に形成され、連通気孔を有する多孔質材料からなり、くび部２１及び空洞部２２を有するヘルムホルツ共鳴器２３が設けられている多孔質層３１と、多孔質層の上に形成された表皮層４０と、からなる。くび部では、多孔質材料が露出しており、空洞部の内壁が樹脂層２５で覆われている。【選択図】図１
SOUND ABSORPTION MATERIAL
吸音材
FURUSAWA HIDEKI (author) / SUGAWARA TATSUSHI (author)
2020-08-13
Patent
Electronic Resource
Japanese
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
| European Patent Office | 2015