Fluidic resonance in a tuned circuit tends to be low frequency and is far less likely to be attenuated by the aircraft structure.
Interestingly, this noise would be very similar to tire rumble at landing.
Cavitation noise tends to be high frequency and is likely to be attenuated by the aircraft structure.
Below is a spectrum for cavitation noise
Typical fluid resonance detectors operate between 2Hz and 300Hz.
Unfortunately, I can not find a spectrum for fluidic resonance that is not limited by copyright.
Those interested in further exploring this topic might Google: Bayesian Modelling of Fluid Flow in Pipelines.