Chapter 1

Electrical Principles


Audio is Acoustic, Mechanical, and Electric. Sound, or wave-motion in air, is sensed, processed, and reproduced by electro-mechanical and electronic devices. It wasn’t always electric, but that’s the medium we use to do almost everything, and do it better.

Sound is transient, it’s gone as soon as it happens, but it can be examined and its equipment tested, largely with continuous tones, or in the steady state. More details of the nature of sound are given in Chapter 4, but as a necessary background to the technology of audio, the briefest account of electricity and its associated parts occupies most of this chapter.


All matter is made up of identical Neutrons, ...

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