Quartz Cantabile by Todd Lerew

The Quartz Cantabile is a new musical instrument that applies a method known to thermoacousticians for converting heat into sound. A ceramic honeycomb material called the stack is placed inside a tube closed on one end. The stack allows air to pass through its many channels, but effectively blocks the heat flow. When extreme heat is applied to the closed end of the tube, the air in this section expands, passing through the stack, where it comes in contact with a relatively cool section of the tube. The air then contracts, pushing back towards the hot end where it again expands. This completes one oscillation, which in succession set up an acoustic standing wave in the tube. The resultant tones are loud and pure—perhaps the purest that can be achieved acoustically.

Here is a  video of a performance using the Quartz Cantibile

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