| ACU | Air-coupled ultrasound |
| AWG | Arbitrary waveform generator |
| CFRP | Carbon fiber-reinforced polymer |
| GW | Guided wave |
| NDT | Nondestructive testing |
| PZT | Piezoelectric transducer |
| RAPID | Reconstruction algorithm for probabilistic inspection of damage |
| SDC | Signal difference coefficient |
| SHM | Structural health monitoring |
| SSM | Scaling subtraction method |
| TOF | Time-of-flight |
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