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So, to simplify, we could take a large mason jar and attach to the bottom a magnet and wire coil attached to a power source, and just pump sound waves into a glass jar of water and coffee grounds. Effectively it's a speaker that holds coffee. Should have the same effect

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Buy an ultrasonic cleaner off the shelf and just decant the grounds out of the coffee when you are done

If the cavitation really is important then no, it won't have the same effect. But maybe the cavitation is not important! Try it out and report back.

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