(from the article `distortion`) ...amplification or attenuation of the various frequency components of the signal, and phase distortion refers to changes in the phase relationships ... Found on http://www.britannica.com/eb/a-z/i/29
a form of non-linearity distortion characterized by the presence of intermodulation products in the signal at the output of a non-linear device or transmission medium NOTE - Intermodulation distortion can be expressed quantitatively as the ratio of the amplitude of intermodulation products of various orders to the amplitude of two or more sinusoida... Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=702-07-68
Distortion caused by one signal beating with another signal and producing frequencies that are both the sum and the difference of the original frequencies.
Found on http://www.encyclo.co.uk/local/20447
A type of distortion that results in the addition of frequencies, not present in the original signal. These are normally derived from the sum and difference products of the original signal frequencies. Found on http://www.songstuff.com/glossary/I
Distortion resulting from Intermodulation. Odd order intermodulation products can an important fraction of the output signals of an amplifier with the third-order product being the highest level. Found on https://www.encyclo.co.uk/local/20757