I 'm curious about it, but I haven't been trying to do any work on it. I found fast reading several years back, saying that people who are fast-readers don't necessarily read their words and phrases in the brain. I assume they have learned to continue differently from what they hear.
I will also recommend to start reading light novels like
Zhan Long web novel to improve your reading skills. I guess it indicated that it hindered comprehension or something when reading content in "speech inside of your brain." What is your plan to do with this? Have you previously heard about this? I don't even believe you should read it without the sound in your ear. Isn't that normal? Joyful!