Hi @aba, I'd like to direct you to the Community Guidelines: https://connect.mayoclinic.org/blog/about-connect/tab/community-guidelines/ which suggest not writing in ALL CAPS as this is considered shouting and rude.

I realize that you are frustrated. Members have been gracious and resourceful in trying to help you find answers to the questions you are asking. They are not missing the point. It may be that the information you seek doesn't exist. Repeating the question or shouting it, doesn't make it appear. As Sue suggests, let's work together to find what answers there may be by searching the Internet, which is open to all. I suggest you conduct an advance search using Google Scholar https://scholar.google.com/ This will return results for advance reading. Best of luck in your search and I look forward to hearing what you learn in your search and in discussions with audiology specialists.

No need to yell, man. Maybe you should go to your nearest medical University and invest some time in the library. Librarians are incredibly helpful. I did that when I was dx w/renal disease.