Another Rhonin silencer, this one will remove his yells from the chat window as well.
Due to how this particular addon works, the zip file contains a complete folder structure. To install, you'll need to extract the zip to the top level of your WoW install folder. Feel free to poke around the zip to see that nothing malicious is going on. It's just important that the sound files end up in the proper place.
To completely remove this addon, you will need to delete the "Sound\Creature\Rhonin" and "Sound\Creature\Brann" folders that are placed in your WoW folder, in addition to the "RhoninMute" folder. Otherwise, Rhonin and Brann will remain audibly mute, while continuing to yell in your chat log.