reply to post by predator0187
predator0187 thanks for the cool presentation. Makes 1 wonder how different sound patterns can move or affect different forms of matter as well as
fluids in the body.
Originally posted by Bedlam
No big deal. What you're seeing falls into the larger group of phenomena we call 'aliasing', and the subset of that called the stroboscopic effect.
Whenever you see videos of helicopters with the blades not turning, or cars moving forward when the wheels appear to be turning backwards, it's the same thing as this. Note that the instructions say to set the shutter speed to 24 fps, then diddle the audio generator between 23 and 25 hz. That causes aliasing between the water motion caused by the speaker and the shutter rate of the camera, and voila! weird stop motions and things that appear to be moving backwards.
Originally posted by Vandettas
Seeing as how you had to explain all of that, I'd say it is a pretty big deal.