The senses of newborn baby.

Your baby will probably also like repetitive, rhythmic sounds that mimic the sound of vibrations or the heartbeat that he heard while he was still in the womb. Tapes of heart sounds, the beating of a tom-tom or other drum, and the loud hum of a vacuum cleaner will all be music to your baby's ears.
Most babies have a sensitive sense of hearing, and they pay careful attention to the noises in their world. Your baby can distinguish among a wide variety of different sounds. Like most newborns, he will probably show a particular fondness for human
For the duration of the first weeks of life your newborn may seem to do little more than eat, sleep, cry, and make dirty diapers. But in reality, all senses are functioning as your baby takes in the sights, sounds, and smells of this new world.
It's hard for us to know exactly what a newborn is feeling — but if you pay close attention to your baby's responses to light, noise, and touch, you can see complex senses coming alive.
Sight
Your newborn can see best at a distance of only 8 to 14 inches, and focus when gazing up from the arms of Mom or Dad. Your newborn can see things further away, but it is harder to focus on distant objects. Still, the light shining in from a faraway window may catch your infant's eye.

After human faces, brightness and movement are the things a newborn likes to look at best. Even a crude line drawing of two eyes, a nose, and a mouth may keep your infant's attention if held close enough.

Although your baby's sight is functioning, it still needs some fine tuning, especially when it comes to focusing far off. Your baby's eyes may even seem to cross or diverge (go "wall-eyed") briefly. This is normal, and your newborn's eye muscles will strengthen and mature during the next few months.

Your newborn is better equipped to see contrasting colors than closely related hues. Black-and-white pictures or toys will keep your baby's interest far longer than objects or pictures with lots of similar colors.

Give your infant lots of interesting sights to look at, but don't overdo it. One item at a time is plenty. And don't forget to move your infant around a bit during the day to provide a needed change of scenery.

Hearing
Most newborns have a hearing screening before being discharged 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 kids born with a hearing loss can be diagnosed through a hearing screening.

In some cases, hearing loss is caused by things like infections, trauma, and damaging noise levels, and the problem doesn't emerge until later in childhood. So it's important to have kids' hearing evaluated regularly as they grow.

Your newborn has been hearing sounds since way back in the womb. Mother's heartbeat, the gurgles of her digestive system, and even the external sounds of her voice and the voices of other family members were 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.

Try to pay attention to how your newborn responds to your voice. Human voices, especially Mom's and Dad's, are a baby's favorite "music." Your infant already knows that this is where food, warmth, and touch come from. If your infant 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 in loving tones.

Your infant may not yet coordinate looking and listening, but even while staring into the distance, your little one is probably paying close attention to your voice when you speak.

Taste and Smell
We assume newborns can smell because we know they can taste, and these are the two most closely related of the senses. Research shows that new babies prefer sweet tastes from birth and will choose to suck on bottles of heavily sweetened water but will turn away or cry if given something bitter or sour to taste.

In the first 6 months, babies get needed nutrition from breast milk or formula and then will start "solid" baby foods. Because infants like sweeter flavors, it's sometimes easier start them on the sweeter vegetables, like carrots or sweet potatoes. As your baby matures, offer different tastes and flavors so that your little one develops a liking for a variety of foods.

And at this point, though, you don't have to worry too much about your baby's taste buds. Breast milk (the best!) or formula will satisfy your newborn completely!

Touch
As it is to most humans, touch is extremely important to a newborn. Through touch, babies learn a lot about surroundings. At first, your baby is looking only for comfort. Having come from a warm and enveloping fluid before birth, babies are faced with feeling cold for the first time, brushing up against the hardness of the crib, or feeling the stiff edge of a seam inside clothes.

Babies look to parents to provide the soft touches: silky blankets, comforting hugs, and loving caresses. With almost every touch a newborn is learning about life, so provide lots of tender kisses and your infant will find the world is a soothing place to be.

Should I Be Concerned?
If you just want a little reassurance that your baby's senses are working well, you can do some unscientific testing for yourself. Hold a small light just out of your baby's direct line of vision, about a foot away from his or her face. Your baby should turn to look at the light. Don't be too worried if it doesn't hold his or her attention for too long — even a brief look at the light indicates that the baby sees it. In just 4 to 8 weeks, a newborn's eyes will begin to follow a moving light.

If your baby's eyes seem to cross more than just briefly, be sure to tell your doctor. In rare instances, medical correction is required. Also tell the doctor if your baby's eyes appear cloudy or filmy, or if they appear to wander in circles as they attempt to focus.

Most newborns will startle if surprised by a loud noise nearby. If you want to check that your baby is hearing, make a sharp noise while standing behind your baby. Your little one should jump a bit — but if not, don't worry. It may mean your baby was concentrating on something else and had "tuned out" the rest of the world at that moment. Just try the noise test again later.

Other ways to rest assured your baby is hearing well: Does crying stop once he or she hears your voice? Does your baby respond to soft lullabies or other music? Do sounds made out of sight capture your baby's attention?

If you have any concerns about your newborn's ability to see or hear, talk to your doctor immediately. Even newborns can be tested using sophisticated equipment, if necessary. The sooner a potential problem is caught, the better it can be treated.