I think then in your case you need the sounder on at exit fault , provided you can hear it when closing the door
I heard things like people coming home and the exit tone still going because the exit contact didn't open let alone close lol and they never bothered to wait for the system to arm , some texecom systems have a very low volume on keypad does a funny sound on set , although galaxy speaker does that double tone high pitched to tell you it's set ,
Modern insulated windows doors etc makes it some times difficult to hear