Thanks so much for sharing this!
I had been thinking about gutting my fragile, old lumia projector to experiment with different wheels, wondering if I could find a way to project-thru and modulate a water-pattern, or a slurry of tiny reflective particles or something... The placement of a mirror and speaker is clever, and flips my idea on its head.
I hope to recreate this and perhaps iterate on it before 2022... and can only imagine how Radiator patterns will look with this effect!
Pointers
O-Like 532@100mW & 650@200mW
Survival Laser 445@1.1W
Projectors
Homemade Variable RPM Lumia Box 405@500mW & 532@100mW & 650@200mW & 460@1.3W
Kvant CM6000 with ScannerMAX 506 30-40k galvos - 637@1.3W & 532@1.8W & 445@3W + DMX Lumia Gratings
Self-Repaired 532@500mW + Pangolin FB3, Chinese Galvos, Analog Modulation
Tools & Software
Radiator Laser Synthesizer
LaserBee USB 2.5W thermopile meter
Spaghetti, RIYA Multibus Lite
Pangolin QuickShow, Beyond Advanced, integrated FB4