I put my sound amplifier in my incubator today to see if I could hear anything in my coturnix quail eggs. It is the kind that has a battery and 2 ear buds on a wire. I ran the wire outside of the bator and put on the earbuds. I certainly can hear little pipping sounds and also once in a while a few chirps. Pretty neat, has anyone else tried this? I put in a new battery before placing it in the bator but I am sure it will be drained by morning. Today is day 16. Maybe they will hatch tomorrow. I have 15 eggs set.