Air compressor noise is a real workplace hazard, causing hearing damage and fatigue. A typical screw compressor runs at 62–80 dB(A), and controlling that noise protects operators and neighbours.
Where the noise comes from
The airend, motor and cooling fan produce most of the sound, with additional contribution from intake pulsation and radiated vibration. Enclosed machines are much quieter than open units, but even enclosed machines benefit from good installation practice.
Reduction methods
- Choose an enclosed, sound-dampened machine from the start
- Fit an intake silencer to reduce inlet noise
- Mount the machine on anti-vibration pads
- Use flexible connections to stop noise travelling along pipes
- Place the compressor in a separate, treated room away from work areas
Layout and treatment
Locate the compressor room away from offices and add acoustic panels if needed. Keep ventilation openings baffled so cooling air can flow without letting noise escape. Even a modest enclosure plus proper mounting typically cuts perceived noise by 10 dB or more.