3 - 6 Months
During this period, babies react to changes in the tone of your voice and show interest in toys with sounds or music. They babble using different sounds and you can notice vocal changes.
Babies with unidentified hearing loss will not display these behaviors or may only do so when the voice, music or sounds are very loud or if there is some accompanying visual aspect to the experience. With newborn hearing screening, the goal is that a baby born with hearing loss has been detected, diagnosed and intervention has been initiated by 6 months of age.