The physiological activity of many organs in the body is accompanied by changes in potential differences that generate bioelectric currents. When changes occur in themselves or in their function for some reason, these electrophysiological signals often change as well. Through instruments, these electrical signals are directed, amplified, converted into graphs, and analyzed to infer the condition of the organ and its function. The familiar electrocardiogram is a graphical representation of the changes in the heart’s electrical potential that is directed and magnified on the body surface. The bioelectric activity generated during nerve and muscle activity is guided, recorded, superimposed, stored and analyzed by a computer, and then displayed or traced down, which is electromyography. There are many kinds of electromyograms. In tinnitus patients, auditory evoked potentials are done, and the main thing done is the electrical response of the auditory nerve.