A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SOUND ABSORBING PANEL AND SOUND ABSORBING WALL
To provide a sound-absorbing member that is suitable for use in a wall surface having light permeability, such as glass.SOLUTION: A sound-absorbing unit 10 comprises a cavity part that is surrounded by an outer shell having light permeability and divided into multiple sections by a partition wall, and bore holes 21-27 that allow the inside and the outside of the cavity part to communicate. A sound wave arriving to the sound-absorbing unit from a direction -D and entering a perforated plate 20 penetrates into the inside of each cavity part via the plurality of bore holes formed in a perforated region, proceeds through a portion covered with a non-perforated region in a direction not parallel to the direction D, and is reflected on a side face of a chamber member 40. Each perforated region of the perforated plate 20 functions as an acoustic impedance matching member, and each cavity part functions as a resonator differing in resonance characteristic from each other. For this reason, as compared with a sound-absorbing material having a single cavity part, it is possible to obtain sound-absorbing effects in a wide frequency band.SELECTED DRAWING: Figure 1
【課題】ガラスなどの光透過性を有する壁面に用いるに適した吸音部材を提供する。【解決手段】吸音ユニット１０は、光透過性を有する外殻に囲まれ隔壁により複数に分割された空洞部と、前記空洞部の内部と外部とを連通させる穿孔２１～２７とを有する。吸音ユニットに対して－Ｄ方向から到来して穿孔板２０に入射する音波は、穿孔領域に形成された複数の穿孔を介して各空洞部の内部に侵入し、非穿孔領域に覆われた部分をＤ方向とは非平行に進行し、チャンバー部材４０の側面で反射する。穿孔板２０の各穿孔領域は、音響インピーダンスの整合部材として機能し、各空洞部は互いに共振特性が異なる共振器として機能する。そのため、単一の空洞部を有する吸音材と比較して、広い周波数帯域において吸音効果を得ることができる。【選択図】図１
SOUND ABSORBING PANEL AND SOUND ABSORBING WALL
To provide a sound-absorbing member that is suitable for use in a wall surface having light permeability, such as glass.SOLUTION: A sound-absorbing unit 10 comprises a cavity part that is surrounded by an outer shell having light permeability and divided into multiple sections by a partition wall, and bore holes 21-27 that allow the inside and the outside of the cavity part to communicate. A sound wave arriving to the sound-absorbing unit from a direction -D and entering a perforated plate 20 penetrates into the inside of each cavity part via the plurality of bore holes formed in a perforated region, proceeds through a portion covered with a non-perforated region in a direction not parallel to the direction D, and is reflected on a side face of a chamber member 40. Each perforated region of the perforated plate 20 functions as an acoustic impedance matching member, and each cavity part functions as a resonator differing in resonance characteristic from each other. For this reason, as compared with a sound-absorbing material having a single cavity part, it is possible to obtain sound-absorbing effects in a wide frequency band.SELECTED DRAWING: Figure 1
【課題】ガラスなどの光透過性を有する壁面に用いるに適した吸音部材を提供する。【解決手段】吸音ユニット１０は、光透過性を有する外殻に囲まれ隔壁により複数に分割された空洞部と、前記空洞部の内部と外部とを連通させる穿孔２１～２７とを有する。吸音ユニットに対して－Ｄ方向から到来して穿孔板２０に入射する音波は、穿孔領域に形成された複数の穿孔を介して各空洞部の内部に侵入し、非穿孔領域に覆われた部分をＤ方向とは非平行に進行し、チャンバー部材４０の側面で反射する。穿孔板２０の各穿孔領域は、音響インピーダンスの整合部材として機能し、各空洞部は互いに共振特性が異なる共振器として機能する。そのため、単一の空洞部を有する吸音材と比較して、広い周波数帯域において吸音効果を得ることができる。【選択図】図１
SOUND ABSORBING PANEL AND SOUND ABSORBING WALL
吸音パネル及び吸音壁
GOMI MASAKI (author) / TAIRA YUDAI (author) / EZURE HARUHIRO (author) / KAWAMURA MASATO (author) / ITO HIROYUKI (author)
2023-10-23
Patent
Electronic Resource
Japanese
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