A proper wobble bass is rarely a single sound. It is often a layered combination of: The Sub-Bass:
The wobble bass takes advantage of this phenomenon by creating a dynamic, moving sound that interacts with our vestibular system. The oscillating frequency creates a sense of movement or vibration, which our brain interprets as a physical sensation. This can be incredibly powerful, creating a visceral response in the listener that's hard to ignore.
While a simple LFO cutting a filter works, modern often uses complex modulation: