Sing verb – To produce musical sounds with the voice. Humming and sing are semantically related. Sometimes you can replace term "Humming" with "Sing", this verbs are similar. Nearby Words: singing, singer, singe, singed, singable
The episode "My Musical" ends with the current Sacred Heart patient humming the song she heard the staff sing when she first entered the hospital which is ironic, since her eardrums about to explode is what threatened her life in the first place.