Sound Attenuation in Duct Elbows

Noise attenuation in duct elbows by reflected sound. Calculate sound power level attenuation in ducts at different sizes and frequencies.

TypeWidth B (mm)125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 Hz
Ducts Unlined150584
Ducts Unlined2505843
Ducts Unlined5008433
Ducts Unlined1000584333
Ducts Lined150171618
Ducts Lined25017161816
Ducts Lined5001516181617
Ducts Lined100051618171718
Sound Attenuation in Duct Elbows | MEPKit Engineering Tools | MEPKit