https://techcrunch.com/2020/10/30/airpods-pro-rattling-crackling-sound-replacement/

Are your AirPods Pro earbuds making weird noises? You’re not imagining it — and you’re not the only one.

Just a few months after Apple started shipping AirPods Pro, some users started noticing that one or both of their earbuds were rattling or crackling. The noises would reportedly get worse whenever the user moved, and would sometimes only develop after months of use.