If it's a Brinsea mini advance it shouldn't be making any alarm/alert sounds unless the temp is too high or low. You can set it so an alarm goes off when the temp goes up down a few degrees. I have mine set to alarm when the temp is 1.8 up or down. I have had it running w eggs since Jan 18.....very quiet. Temp has held aty 99.5-99.6 . Good luck with your hatch!