Many people do not hear as they read. In fact the skill of speed-reading depends on turning the auditory experience off:
There are three types of reading:
Subvocalization: sounding out each word internally, as reading to oneself. This is the slowest form of reading.
Auditory reading: hearing out the read words. This is a faster process.
Visual reading: understanding the meaning of the word, rather than sounding or hearing. This is the fastest process.
Subvocalization readers (Mental readers) generally read at approximately 250 words per minute, auditory readers at approximately 450 words per minute and visual readers at approximately 700 words per minute. Proficient readers are able to read 280–350 wpm without compromising comprehension.
Many people do not hear as they read. In fact the skill of speed-reading depends on turning the auditory experience off:
From https://en.wikipedia.org/wiki/Speed_reading