Sound Attenuation - Main Ducts to Branches

mobile - visible on handheld devices - alternatively go to www.engineeringtoolbox.com!

Engineering ToolBox > Sound Attenuation - Main Ducts to Branches

Sound attenuation for main ducts to branches.

When main ducts are split into branches the sound power level - L_w - is reduced according the size of the branch, or amount of air to the branch.

sound allowance lw split main duct branch

The attenuation can be estimated by the diagram below:

sound allowance

Related Topics

Engineering Toolbox >

Acoustics Room acoustics, acoustic properties - decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity, attenuation ..
Noise and Sound in HVAC Systems Calculate noise, sound and silencers in HVAC systems

Related Documents

Acoustic Calculation of Ventilation Systems A procedure for acoustic calculation of noise in ventilation systems
Sound Attenuation of Lined Sheet-Metal Ducts Sound attenuation in rectangular straight, lined, sheet metal ducts.
Sound Attenuation in Duct Elbows Attenuation in duct elbows is caused by reflected sound. It is only in big ducts and at high frequencies the attenuation is considerable.
Sound Attenuation - Duct split to Terminals Estimation of sound attenuation when ducts are split to terminals
Sound Transmission through Duct Walls Estimating sound transmission from a duct to the surrounding room.
Sound Transmissions through Flanking Paths Noise and sound transmitted through duct walls, through floors or through ceilings

.