DISQUS

Tom_Craver · 11 months ago

Cool idea - but why use so many pistons? Why not use a smaller number, and use acoustic lenses to focus the pulse delivery? Seems like that'd be simpler, cheaper, more reliable, possibly even more effective (since you might be able to design a lens with better focusing characteristics than any finite number of un-focused annular pistons can achieve). If a cubical configuration is too crude, dodecahedral is pretty close to approximating a sphere, and from the picture it looks like that'd be about 1/25th as many pistons. It might be somewhat larger, but probably not a lot, especially if fresnel lenses were used, with materials of different speed-of-sound for each shaped ring - fast for outer rings, slower for inner rings, to make the pulse front curve from flat to spherical, yet still all arrive at the compression point at the same time.

nextbigfuture · 11 months ago

I will try and email the company and ask them about your design question. Also adding another article. Popular Science 2009 had several pages on them. Added a funding update and some more info. More pictures of the current system

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