We call it the death star speaker and it has one single function… to make noise in all directions. It was built mostly by following an instructable on A Dodecahedron Speaker for Desktop Printers ( https://www.instructables.com/A-Dodecahedron-Speaker-for-Desktop-Printers/ ) with the major differences being the addition of a tripod stand and using more readily available speakers.
After a bunch of hours 3d printing, a day in the workshop and some jank of course… out came a working omni-directional sound maker. Combining this speaker with a calibrated USB microphone and an open-source software package called REW allows us to make relatively accurate acoustic readings.
As I alluded to earlier, we used this to help get rid of the reverb from the short circuit set, where we measured a significant reduction between two mic locations. You also saw this bad boy show up in the LTT video about acoustic treating the workshop. Without going too turbo nerd here, we basically used an RT60 reverb decay graph to show how the reverb lessened after adding treatment: