[LAU] [semi-OT] acoustic Instrument question

Hey hey, I'm looking for the name to an instrument. I had a feeling I was looking for a whirly tube (or corrugaphone), but apparently not. I'm looking for the sound in this song: https://www.youtube.com/watch?v=m-jYpFa3Ppk audible between 22-27 seconds. It sounds like a whispering diggeridoo or jaw harp. I thought a corrugated tube could produce this sound when whilred, but all demos I heard of this were much higher and much more pronounced in clear pitch. I'd be very grateful if someone could give me a clue or pointer of how to continue the search at least. Best whishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c Don't, don't let me be the last to know Don't hold back, just let it go <3 (Britney Spears)