Things That Go Bump in the Night

I have a monitor that I use when Tyler is asleep in his crib in my room. That way, when the door is closed, I can hear him when I'm the kitchen or in the basement. After he leaves for the day, I usually remember to turn off the one in my bedroom (but sometimes forget the ones in the kitchen and basement). Often, when that happens, I suddenly hear voices...often lots of voices...usually sounding agitated...coming from the monitors that I forgot to turn off. I've tried to listen, but it sounds like they're speaking a different language. I'm not at all afraid to be here alone (well, not alone I guess, I do have Ed), but when that thing blasts in the middle of the night, it startles me...every time! Luckily, it just happened and it's not the middle of the night!