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A platform for research: civil engineering, architecture and urbanism
PERFORATED SOUND ABSORBING BOARD AND SOUND ABSORBING STRUCTURE
PROBLEM TO BE SOLVED: To provide a perforated sound absorbing board and a sound absorbing structure equipped with the perforated sound absorbing board which can vary a resonance frequency without varying a thickness of the perforated sound absorbing board and a thickness of an air layer on a back surface and without varying a diameter or a pitch of a hole in each place when viewing the perforated sound absorbing board from a front side.SOLUTION: A perforated sound absorbing board 10 includes a plurality of through holes 2, and the through holes 2 are formed in a multistage shape in which cross sectional areas are varied in the halfway.SELECTED DRAWING: Figure 1
【課題】有孔吸音ボードの厚さや背面の空気層の厚さを変化させることなく、また、有孔吸音ボードを正面から見た際の孔の径やピッチを場所ごとに変化させることなく、その共鳴周波数を変化させることのできる有孔吸音ボードとこの有孔吸音ボードを備えた吸音構造を提供する。【解決手段】複数の貫通孔２を備えた有孔吸音ボード１０であって、貫通孔２がその途中で断面積が変化する多段状を呈している。【選択図】図１
PERFORATED SOUND ABSORBING BOARD AND SOUND ABSORBING STRUCTURE
PROBLEM TO BE SOLVED: To provide a perforated sound absorbing board and a sound absorbing structure equipped with the perforated sound absorbing board which can vary a resonance frequency without varying a thickness of the perforated sound absorbing board and a thickness of an air layer on a back surface and without varying a diameter or a pitch of a hole in each place when viewing the perforated sound absorbing board from a front side.SOLUTION: A perforated sound absorbing board 10 includes a plurality of through holes 2, and the through holes 2 are formed in a multistage shape in which cross sectional areas are varied in the halfway.SELECTED DRAWING: Figure 1
【課題】有孔吸音ボードの厚さや背面の空気層の厚さを変化させることなく、また、有孔吸音ボードを正面から見た際の孔の径やピッチを場所ごとに変化させることなく、その共鳴周波数を変化させることのできる有孔吸音ボードとこの有孔吸音ボードを備えた吸音構造を提供する。【解決手段】複数の貫通孔２を備えた有孔吸音ボード１０であって、貫通孔２がその途中で断面積が変化する多段状を呈している。【選択図】図１
PERFORATED SOUND ABSORBING BOARD AND SOUND ABSORBING STRUCTURE
有孔吸音ボードと吸音構造
MASUDA KIYOSHI (author) / TANAKA HIKARI (author) / YAMAGUCHI KOJI (author)
2017-01-26
Patent
Electronic Resource
Japanese
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