Pneumatic silencers are used to regulate the flow rate to achieve a lower resistance and thus have a minimal impact on the operation of your pneumatic system. Compressed air silencers from Festo are used in pneumatic exhaust air ducts to reduce the sound of air escaping from a pipe system.Typically, silencers are installed directly at the exhaust port of a valve and diffuse the released air through a larger surface area which reduces turbulence and thus decreases noise levels.