Headphonographer

Target audiences: the profoundly deaf, strongly visual learners.

This device consists of two microphones, a highly advanced speech-to-text program compressed onto a teeensy chip, and a small head-mounted head-up display device. Looks kind of like a glasses-mounted camera, or highly advanced VR goggles. The microphones sit in the general vicinity of each ear, and feed their input to the speech-to-text program. The program feeds its output to the heads-up display, which shows an approximation of whatever was said to the wearer, in the form of glowy text across their glasses.

The idea is for people to be able to read, instead of listen to, ordinary conversations in which they are involved. (Or lectures, or radio announcements, or ... )

I expect the technology will be possible in a few years.