asterisk-espeak software package provides eSpeak module for Asterisk, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install asterisk-espeak
asterisk-espeak is installed in your system.
Make ensure the asterisk-espeak package were installed using the commands given below,
$ sudo dpkg-query -l | grep asterisk-espeak *
You will get with asterisk-espeak package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Communication Programs |
| Package | asterisk-espeak |
| Version | 2.2-2 |
| Description | eSpeak module for Asterisk |
| Sub Section | comm |