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Can sound exist in a vacuum cleaner? (lemmy.world)
submitted 3 years ago by to c/nostupidquestions@lemmy.ca
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Hey everyone, I've got a question that's been bugging me. So, we all know that sound needs a medium to travel through, like air or water. But what happens with sound in a vacuum cleaner? I mean, it's a vacuum, right? Does it just get all quiet in there? Or is there something I'm missing? Thanks for satisfying my curiosity on this one โ€“ I'm really stumped!

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[โ€“] 2 points 3 years ago* (last edited 3 years ago)

A big fan moves air out of the cleaner giving it a lower pressure inside but not a total vacuum, because air comes in from the handle side (the thing that sucks) to replace it. A bit of air leaks in from other parts of the vacuum too.

Since there's still some air in there it's not like there's no sound.

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