Vibration sound when noise cancellation and transparency are on

I’ve recently buy the AirPods 4 with active noise cancellation, and all was ok, until a few weeks ago I noticed that when the noise cancellation or the transparency mode are on, it’s possible to hear a vibration sound in my right airpod, it’s like a helicopter sound, and it’s so annoying, I tried a lot of solutions but nothing worked, so I wanted to know what it can be and what can I do :(