Noise?

Hello together, would have a question about noises at the omi. How does it sound, if the rear wheel bearing is defective. I don’t know exactly what to keep from my noises. From about 50 km/h there is a roaring buzzing noise from the rear part of the car, which spreads very much in the interior up to about 90 km/h. I also have a sporadically occurring poltern that comes from behind, regardless of the speed. ine too loosely adjusted tailgate or if the exhaust would hit somewhere slightly. But can exclude both (backgate and exhaust) . Maybe one of you already had something similar and can help me to get to the bottom of this annoying thing. Greeting, Speedy