Sound Attenuation in Duct Elbows

Noise attenuation in duct elbows by reflected sound.

Related Topics

• 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.

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  Noise attenuation in rectangular straight, lined, sheet metal ducts.

• Sound - Attenuation and Speed vs. Sound Frequency and Air Humidity

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• Sound - Attenuation and the Directivity Coefficient

  The attenuation in a room depends on the location of the sound source and the receiver - and the room constant.

• Sound Attenuation - Duct split to Terminals

  Estimating sound attenuation where ducts splits to terminals.

• Sound Attenuation - Main Duct to Branch Ducts

  Sound attenuation from main ducts to branch ducts.

• Sound Attenuation in Ducts due to End Reflection

  Low frequency noise transferred from main duct to end terminals is reflected back to main duct.

• Sound Transmission through Duct Walls

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• Sound Transmission through Flanking Paths

  Sound transmitted through duct walls, floors and ceilings.

• Unlined Sheet-Metal Ducts - Sound Attenuation

  Noise attenuation in unlined sheet-metal ducts.

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