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　　But that's not quite true. Nobody else has ever heard your voice---the way you hear it.

　　When you are talking, you set up sound waves. The air outside your head carries the sound waves to your outer ears. But, of course, the sound of your voice begins inside your head. The bones of your head pick up the sound waves, too. They carry the sound waves straight to your inner ears. You get the sound from the outside and inside, too. Other people get just the sound waves from the outside. That is why they don't hear your voice the same as you do.

(1) You _________ hear your voice the way others hear it.

(2) Sound travels in the form of ____________.

(3) When you talk, sound waves are set up inside _________.

(5) The passage is mainly about