Canarina Environmental Software

Canarina CUSTIC software · noise calculation · algorithms 3

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Courtesy of Canarina Environmental Software

In a road case, we shall consider several points.  We shall consider a minimum number of 1000 vehicles per hour N with a 50km/h minimum velocity (100km/h is the maximum velocity). Then we have a 68 dB(A) noise level at 10m from a lineal road (infinity length). The noise level will be,

 

Leq=68dB(A)+30Log(v/50)+10Log(N/1000)-10Log(r/10) 

 

in the lineal (infinite) road case.

 

In the curved road case, the program considers a finite element method of calculation. Each small size of road contributes to the total noise level. Each contribution will be given by

 

 

Li=-10Log(a/180) 

 

being a the angle of the small road size(degrees).

 

To obtain the total noise level, we add the different Li values following the equation

 

Leq= 10.Log[Si10^(Li/10)] 

 

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Canarina CUSTIC software · noise calculation · algorithms 3

It is interesting for modeling software, noise modeling, noise pollution, noise mapping, traffic noise, noise calculations, noise control

 

 

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