Sound Attenuation in Unlined Sheet-Metal Ducts

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The attenuation of sound in some common unlined sheet metal ducts at different frequencies are indicated in the table below:

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Related Topics

• Acoustics - Room acoustics, acoustic properties - decibel A, B and C - Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity, attenuation and more ..
• Noise and Attenuation - Noise is usually defined as unwanted sound - noise, noise generation, silencers and attenuation in HVAC systems

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