Author_Institution :
Bell Telephone Labs., Inc., New York, N. Y.
Abstract :
Electric filters are used to prevent only currents which are in a desired frequency range from passing through a circuit. Changes in magnitudes and phase relations of the currents passing through a filter occur, and these changes are different for different frequencies. By means of the mechanical analogy described in this article, the action of currents in a filter may be observed and clearly understood.
