Application of the short time fourier transform to interpret ultrasonic signals

摘要

This research uses the short time Fourier transform (STFT) to determine dispersion curves of Lamb waves in three different 3003 aluminum plate specimens - a perfect plate (splo), a plate with a quarter thickness notch (splv), and a plate with a half thickness notch (splh). The dimensions of the three specimens are given in Table 1.