The tooth whistle is a mouth position that creates a high pitch screeching noise.
How it's done
- Do the 'f" sound and prolong it
- While you're making the 'ffffff' sound, create a small hole between your top teeth and your bottom lip
- Shift around the position of your bottom lip until you get a small squeak or whistle noise
- Since this is only a mouth position, you can layer with it humming and throat bass