Glow: The First Smart Headphones with Laser Light by Glow, LLC — Kickstarter. Feel the beat. Glow merges state-of-the art sound technology, laser light and a heart rate sensor for an experience like (Tech Gadgets)
This is a video of a Chladni plate experiment in which sand resonates to different frequencies to reveal a particular frequency& SECRET PATTERN. And we all love secret patterns here, right? Think of it as a special door knock.