In most cases, perceptual enhancement brings the sound further from the original objectively (e. g. considering only SNR), but in the end it still sounds better (subjective improvement).

大多数情况下，知觉增强产生的会和最原始的声音会相差较远（如只考虑信噪比（SNR）），但最后发音效果却很好（主观改善）。