Through the reconstruction / strengthening of synaptic pathways that are used in the interpretation of the incoming sensory data.
Yeah, I admit it, I have no idea. I can ignore that buzzing tinnitus in my ears for long periods of time, and I don’t know why.
We learn what is the most important thing to focus on, starting in childhood.
“Look both ways before you cross the street!”
How many times did your parents tell you that?
The brain has what is called the reticular activating system which allows us to filter things out. Take for instance, you never notice the watch on your arm unless the clasp breaks. This allows us to filter out several sensory input, so that we’re not overloaded.