I cannot seem to hear any of the AI traffic take off, land or taxing past me when I am at an airport / gate. I am talking about engine sounds when they go past or the roar when they take off / land. Is there a setting I have not switched off, or is this a shortcoming of fs2020?
Yeah, that seems to be working as expected. Even in real life if you go into the aircraft as a passenger, you can’t hear anything that’s happening outside the aircraft. But it’s loud when you’re still standing in the jetway/stairs outside.
I had the same question in the first month that MSFS was released (it was in the Longitude though). Other planes would silently pass right in front of me. I was told that was by design because the Longitude was designed IRL to be very quiet in the cockpit.
None of the explanations here are accurate. You certainly DO hear airplanes from inside your plane. Ever sat inside a terminal or inside your airplane when a 777 a few gates away starts its engines? The engine start sound is so iconic! The same goes for when you are sat next to a runway holding short of it and a plane comes in to land.
So yes, the sim is broken when it comes to sounds for traffic, not to mention other aspects of AI traffic.
I did a test at KLAX with the CJ4, FSLTL, parked at the side of a runway: I can hear the engine of other airplanes roaring for taking off but sound level is very low from the cockpit, very loud from outside. So I think that is maybe a configuration with the Cj4 that limit from inside those external sounds, not sure if it is a bug or if it is setup like that on purpose. Maybe you can ask in the CJ4 support thread (I did not find any related question):