Thermo-acoustic cooling device disapeared?

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Between 7-10 years ago the discovery channel ran a feature on an inventor and his device that took high intensity sound waves and used them to remove heat from air.

The inventor showed a demonstration where he dipped a tuning fork into a beaker of liquid nitrogen and when removed to the air it began to vibrate @ the fork's resonance.
He then explained that his device used the reverse process wherein a closed back high frequency speaker was coupled to what looked like a spiral rolled type material( metal?) roughly 8" long . This was encased in a clear acylic? Tube to keep the very high levels of sound in.
I think there was an air intake and output tube attached to this device. When it was turned on the output air became progressivley colder as measured.

Jay and the inventor discussed applications for this technology and they agreed it would be good for refrigeration purposes.

Did any of you see this episode ? Do you remember it ? And if so can you comment on whether this came to fruition as an actual device , or was it shelved?

The way I see it ,it could have replaced conventional cooling techniques as a safer more environmentally friendly way to cool things, all because of sound.

[benb]

I haven't heard of this, but your description sounds vaguely like a vortex tube.
Vortex tube - Wikipedia, the free encyclopedia

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I looked at that item , its not close. The "reaction chamber" of the device looked like two sheets of (metal)? 8" wide * 30" long rolled together to form a tightly coiled Pak that was 8" long and around 2.5" in diameter.