The assessment finds that standard TOA methods detect both symmetric and anti-symmetric Lamb modes in noise-free simulations, with noise mainly affecting early symmetric arrivals, and introduces frequency-domain thresholding in CWT plus local-minima AIC to improve robustness.
Effects of noise on lamb-mode acoustic-emission arrival times determined by wavelet transform URL: https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50139
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Assessment of Time-of-Arrival Estimation Methods for Impact Detection in Isotropic Plates using Piezoceramic Sensors
The assessment finds that standard TOA methods detect both symmetric and anti-symmetric Lamb modes in noise-free simulations, with noise mainly affecting early symmetric arrivals, and introduces frequency-domain thresholding in CWT plus local-minima AIC to improve robustness.