CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search A wavelet is a wave -like oscillation with an amplitude that begins at zero, increases, and then decreases back to zero. It can typically be visualized as a "brief oscillation" like one might see recorded by a seismograph or heart monitor . Generally, wavelets are purposefully crafted to have specific properties that make them useful for signal processing . Wavelets can be combined, using a "reverse, shift, multiply and integrate" technique called convolution , with portions of a known signal to extract information from the unknown signal. Seismic wavelet For example, a wavelet could be created to have a frequency of Middle C and a short duration of roughly a 32nd note . If this wavelet was to be convolved with a signal created from the recording of a song, then the resulting signal w...