> The system connects a bolt-clamped transducer with the brewing basket via a metallic horn – transforming a standard espresso filter basket into a powerful ultrasonic reactor.
Now it can be done without shelling out $695 for a dedicated machine. That's progress. I wouldn't be so dismissive.
> However, engineers from UNSW have now developed a new way to make cold brew coffee in under three minutes – just like a regular hot brew – without sacrificing on the taste experience.
I think the commenter you're responding to was calling out the use of the word 'new' (which is used five times in the article) to describe the process, when it's evidently not new at all. The commenter didn't say anything about the price point, and neither does the article.
They make ultrasonic jewelry cleaners for $75 that should work just fine. You're referencing something that is intended to be used with hundreds of gallons of water.
I looked up "transducer" and it seems to be what you'd need. But! You seem to have found where I was wrong: the horn. The horn seems to be the actual expensive part here. They could start a business I guess selling these en-masse. If anyone has any ideas how a maker could create this within reason please reply.
Wars have been fought over coffee, people regularly spend thousands for coffee machines. There are entire companies that exist just to cater to this market.
Now it can be done without shelling out $695 for a dedicated machine. That's progress. I wouldn't be so dismissive.