Great feedback i love suggestions, the siren will be altered to turn off when the operation is pauses, Thanks!
About the pause icon, I actually Think I will change it to Pop up in the center of the operation, and be replaced by a fade-away play icon when the operation is resumed. I dont know if you played with Sound or not, but there are audio clues associated with the pause and resume :)
Thanks for the comment! :) Cheers