Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SILENT VENTILATING STRUCTURE
To provide a silent ventilating structure capable of improving a sound muffling performance while maintaining a ventilation property, and having a higher sound muffling effect than a conventional sound absorbing material and an air-column resonance structure.SOLUTION: In a hood type silent ventilating structure, unlike a traveling direction of sound passing through a first opening 22 and a second opening 24, a coating material 20 selectively exposes the other of a surface of a sound absorbing material 18, and the selectively exposed portion is constituted as a contact face contacting a space in a ventilation hood 16. The sound absorbing material 18 is adhered to an inner face of a hood body 12 opposed to a face connected to a sleeve 14 and the inner face of the hood body 12 opposed to the first opening 22. The coating material 20 is a substrate not allowing passage of sound. The contact face 32 exists in a range of λn/16 from a maximum point of sound pressure of sound waves corresponding to any of wavelengths in a resonance mode, when an order number of a frequency of 100 Hz or more and in an audible range in the resonance mode is designated as n=1, 2...(positive integer) from a lower side and wavelength of the frequency of an n-order resonance mode is designated as λn.SELECTED DRAWING: Figure 1
【課題】通気性を維持したまま消音性能を高めることができ、従来の吸音材、及び気柱共鳴構造よりも高い消音効果を有する消音換気構造を提供する。【解決手段】フード型の消音換気構造であって、第１開口部２２及び第２開口部２４を通る音の進行方向とは異なり、被覆材２０は吸音材１８の表面の他の一部を選択的に露出させて、選択的な露出部分を換気フード１６内の空間と接触する接触面として構成し、吸音材１８はスリーブ１４が接続されている面と対向するフード本体１２の内面、及び第１開口部２２と対向するフード本体１２の内面に貼り付けられ、被覆材２０は音を通さない材質であり、接触面３２は、１００Ｈｚ以上かつ可聴域の周波数の共鳴モードの次数を低い側からｎ＝１、２、…（正の整数）とし、ｎ次の共鳴モードの周波数の波長をλnとする時、共鳴モードの波長のいずれかに該当する音波の音圧の極大点からλn／１６の範囲内に存在する。【選択図】図１
SILENT VENTILATING STRUCTURE
To provide a silent ventilating structure capable of improving a sound muffling performance while maintaining a ventilation property, and having a higher sound muffling effect than a conventional sound absorbing material and an air-column resonance structure.SOLUTION: In a hood type silent ventilating structure, unlike a traveling direction of sound passing through a first opening 22 and a second opening 24, a coating material 20 selectively exposes the other of a surface of a sound absorbing material 18, and the selectively exposed portion is constituted as a contact face contacting a space in a ventilation hood 16. The sound absorbing material 18 is adhered to an inner face of a hood body 12 opposed to a face connected to a sleeve 14 and the inner face of the hood body 12 opposed to the first opening 22. The coating material 20 is a substrate not allowing passage of sound. The contact face 32 exists in a range of λn/16 from a maximum point of sound pressure of sound waves corresponding to any of wavelengths in a resonance mode, when an order number of a frequency of 100 Hz or more and in an audible range in the resonance mode is designated as n=1, 2...(positive integer) from a lower side and wavelength of the frequency of an n-order resonance mode is designated as λn.SELECTED DRAWING: Figure 1
【課題】通気性を維持したまま消音性能を高めることができ、従来の吸音材、及び気柱共鳴構造よりも高い消音効果を有する消音換気構造を提供する。【解決手段】フード型の消音換気構造であって、第１開口部２２及び第２開口部２４を通る音の進行方向とは異なり、被覆材２０は吸音材１８の表面の他の一部を選択的に露出させて、選択的な露出部分を換気フード１６内の空間と接触する接触面として構成し、吸音材１８はスリーブ１４が接続されている面と対向するフード本体１２の内面、及び第１開口部２２と対向するフード本体１２の内面に貼り付けられ、被覆材２０は音を通さない材質であり、接触面３２は、１００Ｈｚ以上かつ可聴域の周波数の共鳴モードの次数を低い側からｎ＝１、２、…（正の整数）とし、ｎ次の共鳴モードの周波数の波長をλnとする時、共鳴モードの波長のいずれかに該当する音波の音圧の極大点からλn／１６の範囲内に存在する。【選択図】図１
SILENT VENTILATING STRUCTURE
消音換気構造
OTSU AKIHIKO (Autor:in) / SUGAWARA YOSHIHIRO (Autor:in) / YAMAZOE SHOGO (Autor:in) / HAKUTA SHINYA (Autor:in)
08.08.2019
Patent
Elektronische Ressource
Japanisch