Humming/roaring

More than likely this is a wheel bearing or another bearing. By turning you are loading and unloading the bearing and the fact that it makes the noise when accelerating and decelerating, I suspect it is a bearing in the differential. However, the wheel bearings are easiest to check so I would start with those.

https://www.2carpros.com/articles/how-to-replace-front-wheel-bearings-and-seals

https://www.2carpros.com/articles/car-howling-noise