According to the way this particular article explains it, no I don't. But according to how I view it yes (as I never stop thinking), but its largely not language based nor tied to the present moment or even reality by default. It only becomes an overt internal monolog when I am doing so with intention and when talking to myself outloud is not an option, and even then though it's sort of patchy. I do do it though and it is very easy for me to do so. I'm not sure if it is a voice though, because in that case that sort of quality isn't a default. I do hear voices when I imagine others speak as I easily remember the sound of folks voices, but I can shift that around as I want and doesn't tend to default. The sound of the voice has to have some sort of emotional meaning for me to be turned "on". Like, when I read I don't hear it in any particular voice, unless I know who wrote it and know their voice (and sometimes I have to "make" that happen).
My self-chatter is most often concept based and somewhat image based. I don't so much hear it as I feel it and know it. It also tends to come at me in packets. The best way I could describe that is I will receive what would be the equivalent of a 2 minute speech, but I instinctively know the content of it already and can move on from it or unpack it depending on what I want/need. It's sort of like if you just walked away from listening to a speech and are remembering it having just heard/learned it. If I want or need to know the details I sort of have to "decompress" it, and that process doesn't go A-B-C-D, it goes in a non-linear fashion.
Generally, I just don't think in a straight line or a straightforward way.
I have an internal monologue/‘hear’ myself. I’m not surprised others might not experience that. Brains are weird.
I wonder if it’s got anything to do with learning styles. I recall taking a test on that & scoring strongly in the verbal/linguistic as well as auditory/musical learning styles, and quite a bit lower on things like visual and kinesthetic. Perhaps there’s a correlation between the inner voice processing & how we learn in general...
I would not be surprised if there is a connection with these. Of the typical types of thinking styles, my most comfortable and strongest is
spatial visualization. Pretty much all of my thinking tends to relate to this, even when I think of non-physical things and is one of the reasons science has always been a fairly natural thing for me to learn. The "feeling" I get when I recall concepts feels extremely similar to that of visualizing objects in my head and rotating them around.
One way to explain it that might be easily understood. When I am driving around and have google maps open (but it's on top-down view and not from the drive forward prospective) I can still easily know where to go and turn. For example, if I am driving south and need to turn east I don't automatically know that I need to turn left (well, I do but that knowing doesn't help me). Instead I glance at the map and in my mind imagine the map rotating 180 degrees from where it is so I have a direct correlation with my facing position. While I do this, I naturally imagine a line coming out from the side for the direction I need to go in. When I mentally rotate it, that line (which goes off into infinity) will sort of "wash over me" and I'll pseudo-physically feel it with respect to the orientation of space. That feeling is what locks in and confirms the direction I need to go. Because of this if I have a map I never get lost. Even if I don't have a map I will still go through this sort of mental process for direction and space. Generally, this style of thinking gets applied to all kinds of stuff for me.
In a way, it's almost as if I don't need language for most things cause information is stored and processed in different ways. When I was young verbal/linguistic styles of thinking were really hard for me and I found them frustrating and redundant. I am much better at those things now, but it's very much a learned skill.