So this happened to be my experience too, but with a slight twist.

In 2020, I was hearing strange sounds and went to the doctor - turns out it was earwax pressed against my ear drum and a bit of infection.

In 2021, I had similar sounding noises and went to the doctor - turns out it wasn't earwax and he couldn't pinpoint on what the reason could be.

It is 2023, I am still having that sound :(

The same happened to me recently. It came suddenly, but a visit to the doctor diagnosed it as ear wax. Took ear drips to soften and remove the wax, and the noise disappeared in no time.

I was surprised with the range of sounds this produces.

I was hearing both white noise and low whistling, the source of which seemed to be moving.