I subvocalise. I don't consider it an issue unless you're actually moving your mouth. It's part of the thinking reasoning process and research has shown you do need to subvocalise to understand to some degree. So be selective. Focus on the words that carry meaning. And, if when do need, are words you could skip and focus on word that are meaningful. That sentence would sound in my mind skip - focus word meaningful.
A further way to reduce subvocalisation is to listen to nature sounds, birds, breeze, brook, ocean sounds.
AlexK
