What it is:
Emacspeak is a speech output system that will allow someone who cannot see to work directly on a UNIX system.
Emacspeak is built on top of Emacs. Once Emacs is started with Emacspeak loaded, users get spoken feedback for all actions. As Emacs can do everything, they get speech feedback for everything they do.
This package includes speech servers written in Tcl to support the DECtalk Express and DECtalk MultiVoice speech synthesizers. For other synthesizers, look for separate speech server packages such as emacspeak-ss and eflite.
To know more about:
To install in ubuntu:
sudo apt-get install emacspeak