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A group of test were conducted to study the just noticeable difference of the reverberation perception and the just noticeable difference of noise length. The just noticeable difference of noise length is about 5% to 10%, but the just noticeable difference of reverberation perception with music motifs is about 20% to 30%. It clarifies that for a long time the just noticeable difference of noise length has been misused as the just noticeable difference of reverberation perception
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Zihou et al. (2006) studied this question.