ABSTRACT
Another example of sine waves is the sound from musical instruments. Moreover, many other electronic signals-such as speech-are complex combinations of many sine waves, all at different frequencies.
As stated above, the study of a-c electronics starts with the properties of simple sine waves and continues with variations in sine wave currents caused by differing voltages. In electronics, many sine wave voltages and currents are produced by circuits called oscillators, and these signals may change many millions of times a second. (Note: A detailed discussion of oscillators is covered in Chapter 9).
