Acoustic motion tracking? Sound like a cool idea. Get it? SOUNDS like a cool idea! 😜 Warning, link contains a huge autoplaying video.
And if you were wondering, yes Hauoli's accostic motion tracking also works in noisy environments. I couldn't hear much sound being emitted from the speaker in our demo, but our microphones picked up a low hum and clicking noise. The company also promises that it's energy efficient (it doesn't really take much to spit out sound), and it can deliver up to millimeter-level accuracy.