19,9 Hz

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A friend who makes music told me that infrasound, below 20 Hz, can’t be heard by humans, but might still be felt.

“……, can you hear me?”

I felt something quietly sad, yet deeply romantic.

做音乐的朋友跟我说，频率低于20hz的次声波，人类是无法直接听到的，但可能通过其他感觉器官感知到。

”……, 你能听到吗?“

我觉得这既忧伤又浪漫。