" The first tip to increasing your reading speed is to decrease the sub-vocalizations you use. A sub-vocalization is something you are probably doing right now. It is when you mentally say and hear the word you are reading. It’s a habit that is mostly unnecessary, though is helpful when you want to slow down for increased comprehension. The simple fact is we can understand and process a word more quickly than we can say or hear it. Putting a stop, or at least decreasing, your internal dialogue while reading will greatly help your reading speed. If reading out loud is the first and slowest level, hearing sub-vocalizations is only the second and slightly faster level. "

― Peter Hollins , Learn Like Einstein: Memorize More, Read Faster, Focus Better, and Master Anything With Ease… Become An Expert in Record Time (Accelerated Learning)