From birth to 2 years old source more and more \"sensitive\"

Text/Huang Lihui (hearing screening, Director of Beijing Tongren hospital, children\'s hearing care expert guidance in section Deputy Chief of Beijing)

After the baby was born, has basic has the sound of external auditory meatus, middle ear, inner ear, auditory nerve and auditory cortex. But of the auditory nerve myelin completed there are individual differences, some babies to about 2 years to complete development. In other words, baby listening can be changes before age 2.

Listening is the birth of newborn babies and adults the same?

In theory, the newborn babies are born, and adult-like functions. However, the auditory sensitivity of the baby needs, and as adults did not distinguish different voices of various sizes at once. So within 3 months after the birth of the baby, even if the normal hearing, reaction to General talking is not too sensitive, but for a lot of noise has a fright reaction.

Gradually matures

In General, the auditory nerve and brain levels of cognitive development is synchronous, as age increase, Acoustic Neuroma growth continues to improve, auditory sensitivity is also increasing. Such as, baby in 3 months within, suddenly heard large of sound will open open eyelid or dynamic finger; to has 6 months around, called he of name on will turn found; 9 months around, on he (she) said \"Goodbye\" Shi, on will do waving action has; 12 months around, on next door room of sound will has reaction; 16 months around, will identified body parts (as eye, and mouth, and ear, and nasal),.

Like to listen to mother\'s voice

Before he was born, although you have never heard his voice, he was always listening to your voice. He is able to recognize your voice, that sounds familiar, made him feel very comfortable.

Like to hear high profile but not sharp sound

While talking to parents and baby are not consciously improve the tone, and this tone seems to be a world, there is no difference between languages. But babies generally do not like to listen to too sharp sound, when they hear such

Noise, baby\'s head to go in the opposite direction, away from the sound source or to cry refused to interfere. Baby ear fatigue threshold well below we adults, don\'t forget to keep quiet of his time in the day.

Musician\'s ear

This study is surprising: babies used to listening to a group of low notes, or when listening to a group of high notes, if suddenly appeared in the middle of a single note, you can clearly see the baby surprised expression. You see, while he was still a little \"hard of hearing\", but had a double \"musician\'s ear\".

Edit/Shen Yan (shenyan@bphg.com.CN)

Source: 2007 issue of the parents must read