olsonexiNov 30, 2023

Why do many microwave ovens hum in an interval of a minor 7th?

https://lemmy.wtf/post/2437281

Why do many microwave ovens hum in an interval of a minor 7th? - Lemmy.wtf

Something that I’ve noticed across most of the microwave ovens that I’ve used is that when they hum while cooking food, I can pick out 2 distinct tones. One of them is pretty clearly 60 hz from the AC power frequency. The other is consistently a minor 7th above that (which would be somewhere around 106-108 hz depending on the exact ratio). What causes this 2nd frequency to be produced?

Show threadMr_BlottNov 30, 2023
Do people actually use microwaves for cooking or is that just a meme?
Show threadShalakushka
I like how instead of imagining there might be something you don't know about microwaves, you just kind of assumed everyone bought a dust and popcorn machine for no reason. It's such an "am I so out of touch?" moment.
Nov 30, 2023 at 12:31pmWeb