For an article posted to Hacker News, this is disappointingly low on technical details. So there is some "heavy signal processing" involved. And there are a few brands that sell it. Um ok. But how do they work? How do they simulate those clues tht the ears get through physical phenomena?

As-is, the article is more like a mix of product history and sales pitch than something a hacker enjoys/expects.

Imagine an article about brtfs just mentioning when it started and that it procides snapshots. Yeah .. sure, but how? That's what interests a hacker.