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Making espresso with ultrasound

Hacker News Top · 4d ago Cached

Researchers at UNSW Sydney have developed a new method to make espresso-strength coffee using ultrasonic sound waves and room-temperature water, reducing energy consumption by up to 75%. Blind taste tests showed the ultrasonic espresso is indistinguishable from traditionally brewed espresso.

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Recreate famous water profiles using supermarket bottled water

Hacker News Top · 2026-05-18 Cached

A website offering simple mixing recipes using supermarket bottled water to recreate famous water profiles for brewing, coffee, baking, and aquariums.

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