tgstation/-tg-station — pull request #331 by Giacomand (2013-04-08 20:55:22+00:00)
Title: Non-Vocal AIs and Cyborgs configuration option.

* Added a two config options which allows you to disable the AI and Cyborgs from being able to vocally speak, except for AIs using the holopad.
* Added a new proc called IsVocal(). Only used by the new system so far but it will allow you to use it to stop mobs from being vocal.