- When a tube is held over a burner at the correct elevation, a loud resonant tone is heard.
- When both tubes are used simultaneously, they create a beat frequency.
- Burners are connected to a small propane tank in the demo cart, the valve is at the side of the cart.
- Open air inlet at base of burner for easier ignition, then close down to maximize white noise.
- A fire extinguisher is available in the cart.
(open valve at propane tank,
check lighter operation and fire extinguisher)
(close valve and drain gas line before storage)
(close valve and drain gas line before storage)