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:
|Enclosure||Sound Pressure Level Reduction|
|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|