Hum rings

I was marveling at the miracle of the Star Wars Kid today, thinking that he rules. I was also thinking about how cool lightsaber noise is. Lightsabers make louder or softer "waummm" noises depending on how fast the Jedi swings them - and who knows, maybe angle, blade heat, midichlorianity and other jedi variables.

I propose rings that make the same noise. Each ring would have a small speaker and motion sensor, which could detect direction and speed of motion. You could wear one ring, one on each hand, or many. The prime application of these rings would be for people who use their hands to talk. If you watch for it, some people really get their hands swinging. The rings would hum awesomely along. People who got good at it would be like orchestral conductors, waving their hands and fighting a personal jedi clone war when they talk to you. When not talking, the rings would murmur and mumble to you as you write or otherwise use your hands. These rings would also be a nifty adjunct for sign language.