The vast majority of people have an ongoing conversation with themselves, an inner voice, that plays an important role in their daily lives. But between 5-10 per cent of the population do not have the same experience of an inner voice, and they find it more difficult to perform certain verbal memory...
With my aphantasia it's not that it's all quiet in there, unfortunately you still get the carousel of regrets/self criticism etc, but it's a carousel of emotions with no narrator if that makes sense