A suspension system for use in a vehicle, the system comprises pneumatic springs for adjusting the ride height of a vehicle. The pneumatic springs are coupled to a compressor for compressing air to actuate the pneumatic springs. The pneumatic spring are coupled to an output of the compressor by a conduit which transfers the compressed air. The conduit forms a pressurised fluid path between the compressor and the pneumatic spring. Wherein the system comprises a noise suppressor for reducing acoustic noise which is radiated from the conduit; the noise suppressor is disposed in the pressurised path.