Noise from Machines - Enclosures and Sound Pressure Level Reductions
Barriers and enclosures to reduce noise sound pressure levels from machines.
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The noise levels from machines can be reduced with barriers or enclosures as indicated below:
| Type of Enclosure | Sound Pressure Level Reduction (dBA) | |
|---|---|---|
| 1 | No enclosure or barrier, machine alone | 0 |
| 2 | Machine on vibration isolators | ≈ 2 |
| 3 | Machine with barrier | ≈ 5 |
| 4 | Machine in a rigid and sealed enclosure | ≈ 20 - 25 |
| 5 | Machine in a rigid and sealed enclosure with sound absorption lining on inside walls - machine on vibration mounts | ≈ 40 - 45 |
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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.
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Sound Propagation - the Inverse Square Law
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Sound Transmission through Massive Walls or Floors
Sound transmission and attenuation in building elements like massive concrete walls or floors.
