OAEs are considered to be related to the amplification function of the cochlea. In the absence of external stimulation, the activity of the cochlear amplifier increases, leading to the production of sound. Several lines of evidence suggest that, in mammals, outer hair cells are the elements that enhance cochlear sensitivity and frequency selectivity and hence act as the energy sources for amplification. One theory is that they act to increase the discriminability of signal variations in continuous noise by lowering the masking effect of its cochlear amplification.
Sheila was always very warm with my son, and very happy to see us everyday! Her house is beautiful, clean, and safe. (Her husband goes on hunting trips - it's okay, but I wished I knew that before I enrolled my son there -, but I guess the guns are locked away.) I felt good about leaving my son there. He never complained. If you want a place where your kid can play with other kids and interact with a kind adult, I highly recommend Angel Camp!