The human ear has the ability to efficiently separate necessary speech signals from a plethora of other auditory signals, even if these signals have similar overall frequency characteristics, and are perfectly coincident in time.

• 人的耳朵能从熙熙攘攘的声音中有效的捕捉到相对自己重要(感兴趣)的信息,即使是这些声音在频率上和时间上都配合得很“融洽”。