I see your situation more clearly after re-reading and also seeing your new responses here in these threads.
I think if you write more on this topic, especially more about your history of hearing and what you can in fact perceive, and publish more on the internet, you will find people who are very interested in this kind of topic - it is something that will 'nerd snipe' many tech minded people - and I am sure you could absolutely make friends in Korea who are interested to help. Having someone with an audiology background, or even a student in neurology who knows their way around audio signals processing / has a DSP / EE background etc. sit in with you for some experiments as you use the line input for you device - someone who also hears what the input is, and can talk with you about it - would be invaluable and could also be a fun social connection- maybe university students, etc. If I spoke Korean and lived in your city I would definitely find it fascinating to try and help out.