http://wccftech.com/playerunknowns-battlegrounds-vivox-audio/

PLAYERUNKNOWN’S BATTLEGROUNDS developer Bluehole Studios has partnered up with Vivox to integrate the company’s proprietary 3D positional audio technology in the multiplayer online battle royale.

Vivox’s audio technology will be used to increase immersion and enable tactical cooperation for gamers in Brendan ‘PLAYERUNKNOWN’ Greene’s runaway hit of 2017. Vivox’s voice chat will provide players with a “much more realistic combat experience that expands the game’s possibilities and increases the strategies that players can use against one another.”