The better the match, the higher the magnitude of the coefficients the transform will produce. Using wavelets is, in effect, a pattern-matching process. Figure 1 shows the process of using a wavelet. The actual wavelet transform takes place in software. That software is usually a C routine that you use as part of your own analysis program.
Wavelet routines are available for many math and data-acquisition software packages.
Some wavelet routines are available free over the Internet. You have to keep trying until you find a wavelet that best matches the characteristic of the input signal you want to analyze or process. You first have to select your mother wavelet. Try to use a wavelet that will produce the best match to the signal you want to analyze. Some examples of wavelets are shown in the top of Figure 1.