Ruben's Tube Demo

Here's a quick demo of the Ruben's Tube I've made. It's 2m, 50mm diameter stainless steel with 1.5mm holes drilled at 15mm intervals. On one end, a propane supply to a 50mm pvc end cap. On the other a 75mm speaker speaker attached to a sin-wave generator. To affix the speaker, I had a 50mm to 75mm adapter (sourced from a exhaust repair place)