How do researchers know that infants can perceive differences among sounds?
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Answer:
Your newborn has been hearing sounds since way back in the womb. Mother's heartbeat, the gurgles of her digestive system, and even the sounds of her voice and the voices of other family members are part of a baby's world before birth.
Once your baby is born, the sounds of the outside world come in loud and clear. Your baby may startle at the unexpected bark of a dog nearby or seem soothed by the gentle whirring of the clothes dryer or the hum of the vacuum cleaner.
Notice how your newborn responds to your voice. Human voices, especially mom's and dad's, are a baby's favorite "music." Your baby already knows that this is where food, warmth, and touch come from. If your baby is crying in the bassinet, see how quickly your approaching voice quiets him or her down. See how closely your baby listens when you are talking or singing in loving tones.
Most newborns have a hearing screening before being released from the hospital (most states require this). If your baby didn't have it, or was born at home or a birthing center, it's important to have a hearing screening within the first month of life. Most babies born with a hearing loss can be diagnosed through a hearing screening.
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