Dual Mode Sensing with Low-Profile Piezoelectric Thin Wafer Sensors for Steel Bridge Crack Detection and Diagnosis

Table 1

AE detection on the 1.6-mm aluminum plate.

PLB size	PWAS AE amplitude (dB)	R15I AE amplitude (dB)
0.7 mm	83	82
0.5 mm	89	89
0.5 mm	78	78
0.3 mm	88	86
0.3 mm	84	78