Sound Attenuation - Duct split to Terminals
Estimating sound attenuation where ducts splits to terminals.
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Splitting ducts to terminals will reduce the sound power level - LN - transferred to each terminal.
The sound power is reduced according reduced volume of air.
For equal terminals the attenuation to each terminal is indicated in the diagram below.
Example - Sound Attenuation from a Duct to Equal Terminals
According the diagram above - for a duct that splits into four equal terminals the sound attenuation from duct to each terminal is approximate
6 dB
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Related Topics
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Acoustics
Room acoustics and acoustic properties, decibel A, B and C, Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation. -
Noise and Attenuation
Noise is usually defined as unwanted sound - noise, noise generation, silencers and attenuation in HVAC systems.
Related Documents
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Noise attenuation in unlined sheet-metal ducts.
