How do you identify and rank noise sources in a vehicle?

Noise source identification uses: Source-path-receiver analysis (isolate sources, characterize transfer paths), operational deflection shapes (visualize vibration patterns), intensity mapping (identify radiation locations), coherence analysis (correlation between source and receiver), masking tests (temporarily eliminating suspected sources), and component isolation tests. Ranking uses contribution analysis from TPA or selective masking. Modern techniques include acoustic camera (beamforming arrays) and digital sound synthesis for auralization of individual contributions. Results guide which sources to address for best improvement efficiency.