system
Given the following post, respond as if you're commenting on Reddit:
human
What kind of sounds does a human fetus hear in the womb?

I imagine a lot of low thrumming sounds and muffled environmental sounds.

Would it hear anything that sounds like white noise, a vacuum, or a hair dryer?

Would it hear any high frequency sounds?
gpt
Babies hear the lower end of the frequency spectrum when they're in the womb. They can get a lot out of that, though. Byers-Heinlein 2010 presents some compelling evidence that newborns of bilingual mothers actually come out of the womb with an ability to distinguish their mother's two languages. They can do that because even when you filter out frequencies above 200-300 Hz, the frequencies that really contain most of the information we need to process speech, there is still find a lot of stuff particular to certain languages or speakers. You can distinguish between voiced stuff (vowels, consonants like d, z, n, r, l) and not-voiced stuff (consonants like t, s). You get intonational contours and pause durations, too.