Thanks everyone.

I found something new and maybe this is a hint.

When I am driving normal speeds even on 'curvy' roads there is no noticeable difference in noise.
However when my wife is not present I can go faster and I noticed during harder cornering that the noise is changing. In sharp left turn curves the noise is diminishing or partially gone and it sharp right turns the noise is getting stronger.

Does that point to the wheel bearing?

Best, Martin