Learning to Listen: Neurological Evidence

Neurological evidence indicates we not only learn to listen, but actually tune our inner ear response based on neural feedback from the brain. We literally are able to actively tune our own hearing.  

When we listen for a flute for example, this is more than a conscious decision to focus on the flute. This creates neural impulses that actively tune ear cells to better hear the flute.  

This whole video is fascinating, but I want to get you hooked right away so check this out:  

“Selectively changing what we’re listening to in response to the content. Literally reaching out to listen for things.

Here’s another good one. Everyone can hear subtle details about five times as good as predicted by modeling. Some of us however can hear 50 times as good. The difference? Years spent learning to listen closely! https://youtu.be/SuSGN8yVrcU?t=1956

Learning to play music really does help improve your listening.  

This video is chock full of neurphysiological evidence that by studying, learning and practice you can develop the listening skills to hear things you literally could not hear before. Our hearing evolved millennia before we invented music. We are only just now beginning to scratch at the potential evolution has bestowed on us.

Both realism and abstraction have their qualities, neither trumps one another and often the grey area between the two is magical. 
I am a neuroscientist and molecular biologist (PhD). Yes, listening is an acquired skill but individuals also differ in their innate (i.e., genetic) ability to discriminate different frequencies. The human auditory system is by far the most critical element in the high end "audio system" - the piece of wetware that is more important than any hardware component.
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You could supply them a funnel as a passive hearing aid?

I am not sure that the wet ware “of the ears” is really the most important.
For instance Japanese ears did not work with Navajo. But I thought that that was the wetware between the ears, more than the ear itself?
And that someone purely and ethnically Japanese, but adopted and raised Dine, would somehow have ears that genetically changed from the statistical group of Japanese to become Dine hearing ears.
Or it seems neurological more than structural..