MayaTlab
1000+ Head-Fier
I think Apple, Sony and Bose are probably the only people developing their own ANC implementations. Everyone else just uses the Qualcomm reference design from the SoC
Interestingly :
https://twitter.com/seanolive/status/1560711037581611009?s=20&t=0vz2JbKaqJ31FNPW76348w
I’ve read that AMS also has a number of ANC solutions in some product (JBL Tour One unless I’m mistaken).
What matters I guess isn’t just the chip but also the acoustic design, the characterisation of the Headphones, and the filters’ design, but I know nothing of these issues (but would love to learn more).