Measuring the similarity of two waveforms I have two approximately sine truncated waveforms of different amplitudes and I want a numerical measure of how similar they are to each other. I am sending a sonic pulse train whose multiple reflections I am receiving. I want to know which of those reflections most closely correlate with each other in terms of wave shape.
Any standard methods?
It seems the term (and process) I am looking for is "autocorrelation".