Turns out that inward facing mic is to counter body noise - see apple’s website where they say “An inward-facing microphone listens inside your ear for unwanted internal sounds, which your AirPods Pro also counter with anti-noise.”
I was having an issue where I could hear loud thumping with every step as I walked, as many people have described on forums like macrumors. When I saw that apple article, and then the placement of the inward facing mic on iFixIt, I realized that a small amount of ear wax had made it on to the grill in front of the mic. Wiping it off with a damp cloth made the thumping go away completely.
What that means is that apple never fixed the issue of thumping/etc caused by the AirPods making a vacuum in your ear with vents. Instead they accepted that it was inevitable, and countered the thumping with anti-sound. Which means that an AirPod with a dead battery would thump when you walk.
Quando isso acontecer, você poderá ver um gráfico da reputação que ele adquiriu ao longo do tempo.
Aqui está uma prévia de como será o gráfico:
Nenhuma reputação adquirida ainda.