Structural Health Monitoring (SHM) techniques have been developed as acost effective alternative to currently adopted Non-Destructive Testing (NDT)methods which have well understood levels of performance. Quantitativeperformance assessment, as used in NDT, needs to be applied to SHMtechniques to establish their performance levels as a basis for techniquecomparison and also as a requirement for practical aerospace applicationaccording to set regulations. One such measurand is Probability of Detection(POD). This paper reports experiments conducted to investigate the locationaccuracy of the Acoustic Emission (AE) system in monitoring events from Hsu-Nielson and fatigue crack AE sources as a route to establish the POD of AE inSHM. It was found that fatigue crack tips could be located at 90% POD within10 mm accuracy.
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