Title is self-explanatory. I'm asking if there is a word or musical term for when a singer is mimicking the sound of the instrument that's playing. An example of what I'm asking for is at the very beginning of the song Dang Me by Roger Miller.
This is a simple form of scat singing. The term is mostly used in jazz, but in the Roger Miller example it's used in much the same way: a bluesy-improvised lick that mimics an instrument.