Calculation of Predictable of Noise level(Sound pressure level) inside room：Finite Line Sound Source. ※Only the range of line source.

Calculation of Predictable of Noise level(Sound pressure level) inside room：Finite Line Sound Source. ※Only the range of line source.

1Sound power level of Source sound：Lw(dB)-
2Distance：r(m)-
3Average sound absorption coefficient：α0＜α＜1
4Total surface area of room：S(m^2)-
5Directivity coefficient：Q1,2 or 4. If source will be set on the floor,Q=2.
6Coordinate value of source：x1(m)x1≦0
7Coordinate value of source：x2(m)0≦x2
8GraphPlot Input Data： , Figure：
9Number of gridlines of Graph x-axis, y-axis -
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Keyword･Reference･Remarks･History

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Keyword

Predictable,Noise level,Sound pressure level,inside room,Finite Line Sound Source,Sound power level of Source sound,Directivity coefficient：Q

Reference

[1]：社団法人全国都市清掃会議：『ごみ焼却施設環境アセスメントマニュアル』,1986,pp.117-126.
[2]：前川純一：『建築・環境音響学』,共立出版,1990,pp.95-99.
[3]：田中俊六、武田仁、岩田利枝、土屋喬雄、寺尾道仁：『最新　建築環境工学　改訂３版』,井上書院,pp.283-284,2006

Remarks

・Noise level(Sound pressure level)：LP(dB)
・Sound power level of Source sound：Lw(dB)
・Average sound absorption coefficient：α
・Directivity coefficient：Q
・Making Equation Image is powered by CODECOGS

History

・2011/01/20：Modification of page title
・2011/01/19：Upload

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