PROBLEM TO BE SOLVED: To provide a noise suppression device and a railway vehicle capable of providing an environment in which voice is easily caught at a low cost, in a portion such as a deck interior of a railway vehicle in which severe noise is generated.SOLUTION: A railway vehicle 1 provided with a deck separated from a passenger room by a partition plate 24 includes: a frame body 31 which has a predetermined thickness and is bonded to a wall surface of the deck 2B; and a fine perforation plate 32 which assumes a plate shape formed of a plurality of fine pores 32a having a diameter of 1 mm or less, is separated from the wall surface 27a and is provided on the frame body 31 so as to cover an opening 31a formed by the frame body 31. Therein, a noise suppression device 3 which absorbs noise by converting vibration energy of air in the fine pores 32a into thermal energy by friction with the fine pores 32a is provided on a prescribed height position of the wall surface 27a.SELECTED DRAWING: Figure 2
【課題】鉄道車両のデッキ内といった大きな騒音の発生する箇所において、声が聞き取り易い環境を低コストで提供できるようにする。【解決手段】仕切板24によって客室から隔てられたデッキを備える鉄道車両1は、所定の厚さを有し、デッキ2Bの壁面に接合された枠体31と、直径が1mm以下の微細孔32aが複数形成された板状をなし、前記枠体31に、壁面27aから離間するとともに、枠体31が形成する開口31aを覆うように設けられた微細穿孔板32と、を備え、微細孔32a内における空気の振動エネルギーを、微細孔32aとの摩擦によって熱エネルギーに変換することで騒音を吸収する騒音抑制装置3が壁面27aの所定高さ位置に設けられている。【選択図】図2
NOISE SUPPRESSION DEVICE AND RAILWAY VEHICLE
騒音抑制装置および鉄道車両
2017-10-05
Patent
Elektronische Ressource
Japanisch
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