Invention to turn text into voice

Liat Negrin, an employee at OrCam, wears a device made by the company that consists of a camera and a small computer. Copyright NY Times 2013

Here's another great invention. Glasses that have a camera that reads text and translate it into words that are read into your ear. Designed by OrCam for the visually impaired, it is capable of reading any English words and whisper them into your ear.

What I need is the sister device, not yet invented. How about a device that listens to words and projects subtitles under people's faces. Then you can satisfy the hearing impaired.