This sound is from Tribes: Ascend VGS Soundboard

The Voice Game System (VGS) is the communication tool in Tribes: Ascend. VGS is to coordinate attack, defenses, as well as jeer at the opponent. Using a series of simple keystrokes a wide variety of information may be passed between players. The standard voices used by default vary depending on the type of class the player is using (higher voices for lighter classes, deeper ones for heavy classes) and custom Voice Packs are also available. Below are the keystrokes for all the commands available.