Wavelets in physics experiments.
Magazù S., Caccamo M.T.
VII - Didattica e storia della fisica
Aula 29C-3 - Venerdì 21 h 15:30 - 18:30
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In teaching wavelet analysis it is advantageous to adopt an integrated mathematical and physical approach. We report the results obtained by the application of a wavelet analysis on different Physics experiments, i.e. variable mass pendulum, variable length pendulum, variable length conic pendulum and RLC circuit. These experiments, which provide non stationary signals, are analyzed by means of comparative Fourier Transform (FT) and Wavelet Transform (WT) approaches. It is shown how, contrarily to FT that provides only an average frequency value for the non stationary signal, WT allows to get information on the time evolution of the frequencies content, i.e. it allows a joint time-frequency analysis.