I would generally agree about the origin of noises and their alternate purposes. However, I would also suggest that it is a very strange, unearthly, or extrord

I would generally agree about the origin of noises and their alternate purposes. However, I would also suggest that it is a very strange, unearthly, or extrordinary phenomenon to have such a massive and fast-moving thing traversing in such silence. For example, there are not elephants that travel so silently that they may accidentally trample rodents underfoot. Alternatively, though, outerspace and underwater, things are much less certain regarding the danger of large masses moving quickly.