This is exactly what I'm trying to figure out at the moment. My guess is that the walls will be just far enough to allow the reflections to not disrupt the air

This is exactly what I'm trying to figure out at the moment. My guess is that the walls will be just far enough to allow the reflections to not disrupt the air immediately surrounding the vehicle, and/or there will be gaps, allowing the shocks to dissipate into the surrounding air.