[Feature Request] Compromise for supporting sounds to be heard only inside or outside

[LillyWho]

According to this if the function is run clientside, the sound is only heard by the player. Metrostroi can already distinguish as to which player entity is the driver, hence it would theoretically be possible to distinguish between sounds that can be heard only from the outside of the train and just from the inside (ie dampened versions of sounds).

This could add to immersion significantly.