Task Force Arrowhead Radio (TFAR) bridges Arma 3 and TeamSpeak 3 for positional audio. Follow the steps below to install the plugin.
On the Steam Workshop page for Task Force Arrowhead Radio (BETA!!!), click the Open folder in Windows Explorer button on the right side. This opens the mod's local directory directly.
In your Arma 3 mods directory, locate and open the folder named @Task Force Arrowhead Radio (BETA!!!).
Inside the TFAR folder you will find addons, keys, and teamspeak. Open the teamspeak folder and double-click the .ts3_plugin file to install it. Restart TeamSpeak if prompted.