Oronym

[…]sometimes what you hear isn't what you're supposed to hear. Oronyms are sentences that can be read in two ways with the same sound.

An oronym that comes from mishearing the lyrics of a song is most often called a mondegreen.

Vowel harmony may serve the purpose of parsing the morphosyntactic words in phrases (i.e., oronym avoidance).

The comedian Jeff Foxworthy often uses oronyms in his Appalachian comedy routine, as when he uses a sentence with moustache: "I moustache [must ask] you a question."