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Psychoacoustics is the science of sound perception, i.e., investigating the statistical relationships between acoustic stimuli and hearing sensations [51]. This study aims to build up the psychoacoustic model, a kind of quantitative model, which could closely match the hearing mechanism. A good understanding of the sensory response of the human auditory system (HAS) is essential to the development of psychoacoustic models for audio watermarking, where the perceptual quality of processed audio must be preserved to the greatest extent.