Convolution: is a mathematical operation defining the change of shape of a waveform resulting from its passage through a filter.
Convolution is one of the basic geophysical data processing operations applied on a waveform.
The principles and calculation of convolution (and other operations such as deconvolution, cross-correlation and auto-correlation) are explained is this series of videos.
All these operations form the common basis for many methods of geophysical data processing, especially in the field of seismic reflection surveying.
Note: This video is made is low resolution to be easily viewed and/or downloaded on mobiles. The HD version of these videos (parts 1 to 6) is present in the same channel and playlist, entitled "Geophysical Data Processing - Convolution - Parts 1 and 2".