Noise from Machines - Enclosures and Sound Pressure Level Reductions
Barriers and enclosures to reduce noise sound pressure levels from machines.
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 |
Related Topics
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Acoustics
Room acoustics and acoustic properties. decibel A, B and C calculations. Noise Rating (NR) curves. Sound transmission through walls. Calculate sound pressure, sound intensity and sound attenuation.
Related Documents
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Sound Propagation - the Inverse Square Law
Doubling of the distance from a noise source reduces the sound pressure level with 6 decibel. -
Sound Transmission through Massive Walls or Floors
Sound transmission and attenuation in building elements like massive concrete walls or floors.
