I live without a body

I live without a body;

I speak without a tongue;

Everyone can hear me,

But no one can see me.

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Scroll down for answer and notes.

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I changed this to the "I" form; the source I used just had "it" instead. Especially because this is about a disembodied voice, I thought it would be fun to make it an "I" riddle. Because of the weirdness of this phenomenon, it is the subject of many riddles, and also of myths that explain its origin (as in the story of Greek Narcissus).

Echo.