Giant tuning fork, barely audible, displayed with stroboscope.

InfraSound: Giant Tuning Fork,-barely in audible range. The sound generated by this giant tuning fork is barely in the audible range. The motion of the tines of the fork can be shown with a stroboscope.
UCB Index: 
B+45+5
PIRA Index: 
3D46.40
Demo Diagram: 

PIRA Taxonomy:

Popularity: