What happens here as I understand it, is you train your subconscious to “translate” the info coming in to tickle your brain neurons to interpret that there’s sound, instead of those impulses coming through from the nerve connections to the ears.
This is in my mind what clairaudience really is.
So to develop your clairs, you have to practice trying to use them. It’s a skill. So like you couldn’t sit down at a piano and just play a sonata, it would take time to learn how to do it and practice to do it well, you train this skill over time.
We have a few free tutorials for this on here, some are collected together here: