[Lokibob]

That is correct with one addition, the released energy can go back into the production of more sound waves, and the excess energy can be captured.

In other words, once started, no more energy in needed to keep it going. (perpetual energy)

[MineralMan]

"That is correct with one addition, the released energy can go back into the production of more sound waves, and the excess energy can be captured.

In other words, once started, no more energy in needed to keep it going. (perpetual energy)

"

Well, perhaps. I find this story interesting, and will follow its progress. Time will tell if this has a practical application or is another interesting, but useless, experiment. I'm hopeful, but not convinced.

[expatpat]

Only until you run out of deuterium in your machine.

[ArGee]

In other words, once started, no more energy in needed to keep it going. (perpetual energy)

Not precisely. You need to feed it. And, as someone pointed out, the value of the system lies in the ease or difficulty of getting your hands on the fuel.

Shalom.

[Poohbah]

In other words, once started, no more energy in needed to keep it going. (perpetual energy)

You still need fuel.