A team of French researchers has developed a specialized ultrasound technique to allow people to visualize the shape of the tongue during speech. This “visual biofeedback” system could help with speech therapy.

https://www.medgadget.com/2017/10/tongue-ultrasound-speech-therapy.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Medgadget+%28Medgadget%29