system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do we think we sound better when singing than we really are?

I know I suck at singing, but only after recording myself. Problem is, in my head, I think I sound good.

Why?
gpt
Because of how we hear our own voice is actually not like how others hear your voice. Your voice sounds different to you than to others.

The voice originates in you and the sound going out from your mouth doesn't go straight to your ears, but by bouncing a lot. Not all sound actually goes out of your mouth, it also makes your mouth vibrate, which makes your head vibrate, and then the stuff you hear with vibrates and you hear the sound.

Sound is actually just vibration of material, be it air or your head. Your head vibrates differently from air, because they are different materials. Water also vibrates differently, which makes sounds in water sound funny. Also, this is why there is no sound in space, because there is no material (air) which would vibrate so that the sound from place A would go to place B.