Sound attenuation for FS2020 Arrow
A request to have a click spot at the headphone sockets that will reduce the cockpit noise, similar to that which you experience in RL when you put on your headset.
If it is easy to accomplish also add it to other aircraft.
Did you check the Headset simulation option in the Audio settings of MSFS?
I think it does exactly that.
Note that the Turbo Arrow seems to have an issue with the engine sound with this option enabled, but I'm sure it gets solved with an update at some point: