This post introduces the reader to speech signal processing. We will mostly focus on speaker verification. First the term speaker verification will be explained. Next, we will talk about the very basics of the human vocal system as well as the human auditory system. The understanding of both topics is important, in order to understand some of the techniques common in speech processing. After that, we will have a look at the signal representation of speech. Finally, we will talk about the basic elements of a speaker verification system.