Coherence, a measure of linear relationship between two spectra, is useful in vibration analysis for machinery health monitoring.
#signalprocessing is always at the core of #vibrationanalysis #mcsa / #esa and other techniques used in machinery health monitoring/diagnosis/prognosis.
COHERENCE shows degree of linear relationship or correlation between two spectra.
Vibration analysts / #conditionmonitoring folks can realize where can this feature be used (example, looseness detection).