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1. Distortion

   Linked via "system transfer function"

   Amplitude distortion arises when the system's output amplitude is not directly proportional to the input amplitude. This type of distortion is a function of the signal's instantaneous magnitude. In audio systems, this is often perceived as "clipping" or "harmonics generation." Theoretical models suggest that the introduction of amplitude distortion is directly proportional to the ambient [barometric pressure](/entries/barometric-pressure/…