Hi, I recently moved in Apartment with my two babies and had same problem first when she comes to my place (one is staying with me bi-weekly (with my ex) and my unit is right by elevator so she always burke every time when the ding sound of elevator over our door for the fist day.... then next day she is just fine
maybe give a some time... they eventually get used to it?
My other puppy is with me all the time and i got her when I already in the unit so she used to it and never burke for that sounds.