A baby born after 24 weeks has a nearly complete cochlea (hearing organ) and sensory organs and when born prematurely, they are thrust out of the quiet atmosphere of the womb into the NICU. In quiet environments, infants can hear and discriminate the human voice, this gives them the opportunity to hear and respond to voices of family. Auditory learning is important for language acquisition and social attachment processes.  There is evidence that unusual stimulation in the third trimester of pre term babies, such as noise levels that are much higher than they would have been in the uterus, can result in atypical brain development.