Intermodulation on loaded telephone cables

This paper deals with the relationship between the disturbing effect of speech and that of pure tone, the harmonic e.m.f. due to single sinusoidal current, the summation of third harmonic e.m.f.s in a long cable, the intermodulation e.m.f. due to two sinusoidal currents, the summation of intermodulation e.m.f.s in a long cable, the summation of the noise due to successive repeater sections, the experimental determination of intermodulation voltages on a coil-loaded artificial cable, observations of intermodulation on continuously-loaded cable, empirical rules for estimating the cross-talk due to speech, and the possibility of reducing intermodulation effects.