10 拡散音場より開口する円孔及びスリットからの自由空間内減衰勾配について

DOI Web Site Web Site

書誌事項

タイトル別名
  • 10) ON THE SOUND ATTENUATION IN FREE FIELD ALONG THE CENTRE LINE OF CIRCULAR OR SLIT-LINE OPENINGS OF DIFFUSED SOUND FIELD
  • 拡散音場より開口する円孔及びスリットからの自由空間内減衰勾配について
  • カクサン オンバ ヨリ カイコウ スル エンコウ オヨビ スリット カラ ノ ジユウ クウカン ナイ ゲンスイ コウバイ ニ ツイテ

この論文をさがす

抄録

Assuming a opening from diffused sound field has the nature as though it is a plane-like assembly of non directional point sources, I analized the sound intensity attenuation along the perpendicular centre line from circular and slit-like openings and then proved experimentaly the analized logical formulas of attenuation are resonable for practical use, and for all frequencies. Some of the important results of this investigation are; 1. Ratio of sound intensity from circular opening is log_e{1+(R/l)^2}. R: radius of circular opening from diffused field. l: distance of receiving point from the opening. 2. Ratio of sound intensity from slit-like opening is 1/l tan^<-1> b/<2l> b: length of slit when the length of slit is much larger than width of it. l: distance of receiving point from the opening. 3. Sound intensity from point source (for circular opening when R/l<0.25, for slit-like one when b/2l<1) attenuats by 1/l^2 law. But sound intensity from line source (for slit b/2l>3) attenuats by 1/l law and for plane source attenuation by distance of receiving point is very little.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ