The most effective way to reduce the compressor noise is at the source, i.e. the compressor impeller itself must produce less aerodynamic noise rather than using any silencers. Here we present a redesign work for an existing impeller wheel using the 3D inverse method with an in-house aeroacoustic code
This paper on transonic turbocharger compressors looks at the most effective ways to reduce noise while also meeting traditional requirements such as good choke and stall margin, high boosting pressure ratio and high stage efficiency.