Yes. You know how a bicycle only stays upright while it is in motion? That is how the black "brain" is with speech. They can only comprehend input while there is active output, and it works both ways, black people who have damage in their Wernicke's area (responsible for language comprehension) from strokes or TBIs lose the ability to speak while other races do not
Also, You know how black people will "loop" the same phrase over and over when they're agitated, this is basically like how a race car driver will rev the engine before a race, they're clearing all possible neurons so they'll be ready in a fight or flight situation
I think a better analogy is active radar, the system detects objects by transmitting a signal and reading the return. It cannot perceive passively. It has to "speak" to "hear."