Noise from Machines - 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:
| 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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