﻿ Calculation of Predictable of Noise level(Sound pressure level) inside room：Plane Sound Source. ※Only the range of plane source.

# Calculation of Predictable of Noise level(Sound pressure level) inside room：Plane Sound Source. ※Only the range of plane source.

 1 Sound power level of Source sound：Lw (dB) - 2 Distance：r (m) - 3 Average sound absorption coefficient：α 0＜α＜1 4 Total surface area of room：S (m^2) - 5 Directivity coefficient：Q 1,2 or 4. If source will be set on the floor,Q=2. 6 Coordinate value of source x1：(m),x2：(m) x1≦0,0≦x2 7 Coordinate value of source y1：(m),y2：(m) y1≦0,0≦y2 8 Graph x-axis:Lw(dB),y-axis：Lp(dB) x-axis:r(m),y-axis：Lp(dB) x-axis:α,y-axis：Lp(dB) x-axis:S(m^2),y-axis：Lp(dB) x-axis:x1(m),y-axis：Lp(dB) x-axis:y1(m),y-axis：Lp(dB) Plot Input Data： YesNo , Figure： OnOff 9 Number of gridlines of Graph x-axis, y-axis -
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## Keyword

Predictable,Noise level,Sound pressure level,inside room,Plane 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：Upload

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