﻿ Calculation of Predictable of noise level made by operating machine：Single source

Calculation of Predictable of noise level made by operating machine：Single source

 1 Width of room w1：(m),w2：(m) - 2 Size of partition a：(m),b：(m) Width：a,Height：b. 3 Average sound absorption coefficient α1：,α2： 0＜α＜1 4 Distance r1：(m) r1≦(w1-1) 5 Power level of sound source machine：Lw (dB) - 6 Directivity coefficient：Q 1,2,4 or 8. If source will be set on the floor,Q=2. 7 Transmission loss of partition：TL (dB) - 8 Graph x-axis:α1,y-axis：L1in,L1out(dB) x-axis:α2,y-axis：L1in,L1out(dB) x-axis:r1,y-axis：L1in,L1out(dB) Plot Input Data： YesNo , Figure： OnOff 9 Number of gridlines of Graph x-axis, y-axis -
:Export Graph Image.

Keyword

Predictable of noise level,operating machine,Single source,Average sound absorption coefficient,Power level of sound source machine,Directivity coefficient,Transmission loss of partition：TL

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]：環境省 大臣官房 廃棄物・リサイクル対策部：『廃棄物処理施設生活環境影響調査指針 平成18年9月』,pp資3-6-資3-10.
[3]:Website of Dr.Apple L.S.Chan：Transmission of Sound in Open Space

Remarks

・Noise level：L1in,L1out
・Average sound absorption coefficient：α
・Power level of sound source machine：Lw
・Directivity coefficient：Q
・Transmission loss of partition：TL