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Entirely new way of making espresso unveiled (www.unsw.edu.au)
submitted 2 months ago* by to c/science@lemmy.world
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[–] 1 point 2 months ago (1 child)

Piezotransducer? As in the little thing that makes electronics beep and buzz?

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  • [–] 1 point 2 months ago (1 child)

    Yeah basically, but at a much higher frequency since it's ultrasound. Human hearing tops out at 20khz, and this would be close to 50khz

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  • [–] 1 point 2 months ago (1 child)

    I found one for sale that does 40k that has the same form factor as the one shown in the paper. I almost want to make a high-speed coldbrew system but I don't expect it'd be worthwhile for the coffee, only maybe for the fun of building it.

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