Common items to consider and possible solutions
| Items to consider | Possible solutions | |
| Vibrations of parts or panels | Tighten parts or panels | |
| Cover them with a rubbery material | ||
| Vibrating ground | Install silent blocks | |
| Impacts of parts on a hard surface | Tilt the plate on which the parts are falling | |
| Cover it directly or in a sandwich with a rubbery material | ||
| Mechanical noise | Use helicoidal gears | |
| Use plastic materials | ||
| Equilibrate rotating parts | ||
| Aerodynamic noise | Avoid discontinuities (elbows) or sharp edges in the air stream | |
| Use silencers in ducts | ||
| Air jets | Use exhaust mufflers for decompression air jet | |
| Use special air guns | ||
| Reduce the air velocity of the jet | ||
| Avoid the impact of the air jet on a sharp edge or perpendicular to a surface | ||
| Acoustic enclosure on the machine | Use hermetic enclosure covered with rubbery materials | |
| Install absorbing materials inside | ||
| Pure tones | Equilibrate rotating parts | |
| Dampen the blade on power saws | ||
| Use rubbery materials on resonating parts | ||
| Relocation of the source | Move the source away from the workers | |
| Install a screen between sources and workers | ||
| Acoustic treatment of the room | Add some absorbing materials near the source if the room is highly reverberant | |
| Check noise transmission from adjacent rooms or from the outside | ||