All loudspeakers, amplifiers, and transmission paths introduce various types of distortion into audio signals. While energy contribution of nonlinear distortion to the distortion signal is comparatively small it has a significant impact on the sound signal quality in terms of the auditory perception. Similar energy characteristics of a nonlinear distortion signal can affect the subjective quality evaluation to different extents. This makes it important to accurately extract the nonlinear distortion signal from a musical signal in the simultaneous presence of significant distortions of other types for the auditory perception relevant objective evaluation of nonlinear distortion. The paper offers a method for quantitative evaluation of a nonlinear distortion signal in terms of its audibility and a method for prediction of subjective ratings of signals with nonlinear distortion.
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