Why do audio recordings of your own voice sound tinnier and higher than you expect? Matt Soniak reveals the reason:
Whenever you speak, your inner ear is stimulated both by internal vibrations in your bones and by the sound coming out of your mouth and traveling through the air and into the ears. This combination of vibrations coming to the inner ear by two different paths lends your voice as you normally hear it a unique character that other, "air only" sounds don’t have. In particular, your bones enhance deeper, lower-frequency vibrations and give your voice a fuller, bassier quality that’s lacking when you hear it on a recording.