trapped chests dont make open and closing noises as normal chests

i had made a chest room and i really liked the fact that you can put trapped chests and normal chests by each other, so i made a chest room and when i was putting items in the chest i realised that the trapped chests were not making noise then i wondered that if you wanted to make a trap, you can tell if the chest is a trap chest or not.

thanks, Delsin