First, we might not get any auditory or visual response.

首先，我们可能得不到任何听觉或视觉反应。

Around 20% of people will actually hear a thud each time it lands in a phenomenon known as visually evoked auditory response.

大约 20% 的人会在每次着陆时听到“砰”的一声，这种现象被称为视觉诱发听觉反应。