失真是指录还系统重放的声音与原始节目声音之间差异程度。系统的失真通常分为稳态失真和瞬态失真两类,而稳态失真又分为线性失真和非线性失真。 Distortion refers to the difference between the sound reproduced by the recording system and the original program sound. System distortion is usually divided into two types of steady-state distortion and transient distortion, and steady-state distortion is divided into linear distortion and nonlinear distortion.