How cool - as an MIT undergrad back in the 80’s I spent quite a bit of time trying to design a device for this purpose using ultrasound to probe what’s going on

How cool - as an MIT undergrad back in the 80’s I spent quite a bit of time trying to design a device for this purpose using ultrasound to probe what’s going on in the throat/mouth during subvocalized thoughts. For me the genesis was realizing I couldn’t “say” sentences in my head any faster than I could say them out loud, and suspecting that my brain was trying to subvocalize the words (send below-threshold activation signals to the muscles in my mouth and throat, and accidentally introducing speech rate limiting in the process). I’ve no formal proof if that’s the case, but it does appear they were able to make the concept work. As cool as this kind of tech is, there are a lot of really troubling interrogation style abuses that become possible if you can hear a person’s subvocalized thoughts.