you are viewing a single comment's thread.

view the rest of the comments →

[–]jet199 16 insightful - 2 fun16 insightful - 1 fun17 insightful - 2 fun -  (0 children)

Your vocal chords move a little when you speak in your head as well.

https://www.smithsonianmag.com/innovation/device-can-hear-voice-inside-your-head-180972785/