Coherence theory-based analysis of time–space coupling between internal flow noise and ...
royalsocietypublishing.org
Coherence theory reveals the hidden handshake between pressure pulsations and hydraulic noise — and why understanding that link could transform how engineers silence fluid machines.
Coherence TheoryWave-Source CouplingSignal Processing TheoryFluid Dynamics
Theory Briefing
- Pressure pulsations inside fluid machinery are directly coupled to hydraulic noise, with coherence theory quantifying the strength of that link across all flow conditions.
- The study uses time–space coupling analysis to map how internal flow disturbances translate into radiated sound, exposing the physical chain from source to noise.
- Coherence theory acts as a diagnostic lens here — pinpointing which pressure fluctuation frequencies most powerfully drive acoustic output, enabling targeted noise reduction.