Which symbol conveys the theme of finding and releasing one's voice in Walt Whitman's "Song of Myself"? megaphone yawp hilltops rooftops

yawp

This sound is what Whitman uses for his narrator to completely and fully express himself. He makes this sound to represent his freedom and that he is incapable of being held back, tamed, or restrained in any way. It is a full release of his voice and himself.