《深入探讨20赫兹的科学奥秘》日系韩系亚洲系列
作者：娄显宸, 发布时间：2026-02-20 02:55:36
Human hearing is capable of detecting sound waves between 20 and 20.000 Hz. ... merely a small fraction of the frequency spectrum. Most sounds around us go unnoticed.
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