Galton's whistle: Compressed air whistle.

Primary tabs

(B)Waves - B+45: Sound Spectrum/Sources

Galton's Whistle: from audible to ultrasonic frequencies. The compressed-air hose is coupled to the whistle, and the micrometers are adjusted to give the desired frequency,-from very high pitched to ultrasonic.
UCB Index: 
B+45+45
PIRA Index: 
3C20.15
Demo Diagram: 

UCB Taxonomy:

PIRA Taxonomy:

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B+45+50 Helmholtz resonators drive radiometer vanes, using tuning forks.