system
Given the following post, respond as if you're commenting on Reddit:
human
Why does my voice sound so different when it's recorded as opposed to when I speak?
gpt
Your skull has certain acoustic properties.  It allows some frequencies (pitch of your voice) to pass through it better than others.  The result is that when you talk, your eardrums hear what comes through the air (unmodified) PLUS what passed through your skull (which has a different frequency spectrum than through the air).  Thus, you hear something different!