A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SOUND ABSORBER
To provide a sound absorber having sound absorption performance in a wide frequency region including a frequency region less than 2 kHz.SOLUTION: A sound absorber 1 comprises: a resonator part 10 which is formed of a material which does not have communication holes and in which a Helmholtz resonator 13 having a neck part 11 and a cavity part 12 is arranged; and a porous layer 20 which is formed above the resonator part and is formed of a material having the communication holes. An opening part 21 is formed in the porous layer and the opening part is connected to the neck part of the resonator part.SELECTED DRAWING: Figure 1
【課題】２ｋＨｚ未満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材料からなり、くび部１１及び空洞部１２を有するヘルムホルツ共鳴器１３が設けられている共鳴器部１０と、共鳴器部の上に形成された、連通気孔を有する材料からなる多孔質層２０と、からなる。多孔質層には、開口部２１が形成されており、開口部が共鳴器部のくび部と繋がっている。【選択図】図１
SOUND ABSORBER
To provide a sound absorber having sound absorption performance in a wide frequency region including a frequency region less than 2 kHz.SOLUTION: A sound absorber 1 comprises: a resonator part 10 which is formed of a material which does not have communication holes and in which a Helmholtz resonator 13 having a neck part 11 and a cavity part 12 is arranged; and a porous layer 20 which is formed above the resonator part and is formed of a material having the communication holes. An opening part 21 is formed in the porous layer and the opening part is connected to the neck part of the resonator part.SELECTED DRAWING: Figure 1
【課題】２ｋＨｚ未満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材料からなり、くび部１１及び空洞部１２を有するヘルムホルツ共鳴器１３が設けられている共鳴器部１０と、共鳴器部の上に形成された、連通気孔を有する材料からなる多孔質層２０と、からなる。多孔質層には、開口部２１が形成されており、開口部が共鳴器部のくび部と繋がっている。【選択図】図１
SOUND ABSORBER
吸音材
FURUSAWA HIDEKI (author) / SUGAWARA TATSUSHI (author)
2020-08-06
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
/
E04C
STRUCTURAL ELEMENTS
,
Bauelemente
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