(Optional) Set up weather so wind is clearly audible
1. Get in a Hunter/Ifrit as driver/passenger
2. Observe that "interior" variation of sounds are played (wind is muted, sounds coming from an external source are muffled) as expected
3. Switch to gunner seat
4. Wind/other sounds play their "exterior" variations, as if the player was out of the vehicle (loud wind, engine and gunfire)
Expected result: sounds are muted/muffled as being inside of a closed vehicle when in the gunner seats of the Hunter/Ifrit vehicles.