Silenceman
Mechanical
Dear All,
When the duct lined with the muffler w can apply the formula NR = 1.05*alfa^1.4*L*P/S
Where;
alfa = Sabin absorbtion coefficient
L = Lenght of duct (m)
P = Perimeter of duct lined (m)
S = Cross section area of duct (m2)
If the silencer consists of duct lined, pod and the inner ring (as the picture). How to calculate the noise reduction(NR)?
When the duct lined with the muffler w can apply the formula NR = 1.05*alfa^1.4*L*P/S
Where;
alfa = Sabin absorbtion coefficient
L = Lenght of duct (m)
P = Perimeter of duct lined (m)
S = Cross section area of duct (m2)
If the silencer consists of duct lined, pod and the inner ring (as the picture). How to calculate the noise reduction(NR)?
lease see FAQ731-376 for tips on how to make the best use of Eng-Tips.