“当耳机只插入一半时，左右声道的声音信号被短路在一起，导致人声几乎消失，而伴奏音乐仍然可以听到。这是因为在音乐中，左右声道的声音信号具有明显的相位差异，而在人声中，声音信号几乎是相同的。解决了很久之前的疑问
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