I must state that during this experience, I was a closed minded skeptic and would give EVP's no more than a cursory glance.
I was a stock trader and after work would skype my friend and co trader to discuss the next days strategy. This I would record for reference.
My daughter, Kim, would arrive home at the same time as I and have a "power hour" nap on the couch.
One day on playback, I heard a whispered female voice saying "Kim sleeping". I was astounded as we were the only people in the house and I never ever mentioned to my trader pal that she was at home with me so it could not have been him.
After this episode, I would get 2 to 3 short sentences in the same female voice.
I saved these voice clips in Audacity and one day I played them back to my wife and daughter. With the increase in volume, we were stunned. It was the voice of my sleeping daughter. We have absolutely no doubt.
My daughter then left home and the voices stopped. Creepy.