Complete Cycle of Conversion

The cycle of actions thus is complete; one complete sound-wave in air has produced a cycle of motion in a diaphragm, a cycle of current in a line, a cycle of magnetic change in a core, a cycle of motion in another diaphragm, and a resulting wave of sound. It is to be observed that the chain of operation involves the expenditure of energy only by the speaker, the only function of any of the parts being that of translating this energy from one form to another. In every stage of these translations, there are lo es; the devising of means of limiting these lo es as greatly as po ible is a problem of telephone engineering. IMG:384091999325875926_fig002_t.gif.png:Illustration_ Fig. 2. Magneto Telephones and Line Fig. 2. Magneto Telephones and Line View full size illustration.