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 |
