Have you ever heard a recording of your voice, expecting to hear the sound you hear in your head when you talk, only to discover the voice on the recording sounds different? Maybe a little higher than you’re used to? Don’t worry, this is a common problem, caused by the way sound vibrates in our skulls and through our heads. Sound impossible? This video from the folks at Mental Floss breaks down exactly what happens when we talk and why voices seem deeper in our heads than they do on recordings. Don’t worry, you aren’t crazy, just a little higher pitched than you think you are.