Gaijin again messed up the sounds , it was super easy to idetify enemy or ally tank by its sound , you could easly say if its Leo , Abrams , T80 or BMP , Challanger etc.
Not its all muffled that you can`t really say.
Not to mention they made helis so silent that you barely hear them even if its on top of your head . WTF they are doing !? Not to mention there was nothing in patch notes.