They're not so different. For hundreds of years, we've been taught that our senses pickup very distinct and separate things in the world.
Fortunately, they're not as separate as they seem to be, lest we be missing more than our fair share in between. Our senses thankfully pickup different ranges of the same vibrations, the proof that we often experience of this without any scientific mumbo jumbo, is they often times overlap.
For example: When something is loud enough, you also feel it. When you feel something hot enough, you can often times see that it is emitting heat (red hot metal). Other good examples are elephants hearing with their feet, bats and dolphins or even humans seeing with their ears (as seen in Amazing human feats). Their senses either by design/evolution or circumstance over lap more than what seems typical to make up for necessary sensing, usually though with the sacrifice of another important sensor, but not necessarily.
Things in general are not as separate as they seem. But it's not so difficult to realize when we look at the things that are literally right in front of us. When we look with two eyes, we see one picture and when we see rocks falling we hear their sounds even from far away with our eyes (visualizing sound with the eyes)... When we hear footsteps behind us, we visualize the sight of a person with our ears.
That's not to say that our senses have no gaps in between them, making them appear separate, otherwise there would not be the need to have more than one (or two as a backup!).
If you happen to know any sources that also explore this, please paste a link to them in the comments below, I'd love to learn with my readers!