Noise exceeding 70 decibels will damage children's hearing system. When it reaches 80 decibels, children will feel very noisy and uncomfortable. If the noise often reaches 80 decibels, children will have symptoms such as headache, dizziness, tinnitus, nervousness and memory loss. The healthy growth of infants needs a quiet and comfortable environment. If they are stimulated by noise for a long time, they will become easily excited, lack of tolerance, lack of sleep and lack of concentration.

Extended data:

Noise during pregnancy or damage to fetal hearing, affecting baby's brain development;

1. Pregnancy 16~ 19 weeks, fetal hearing began to form. At this time, the baby can hear the mother's heartbeat, blood flow, gastrointestinal peristalsis, and can also hear her gentle voice and singing.

These sounds are about 30 decibels, just like whispers in the ear, and will not have adverse effects on fetal hearing. By the 25th week of pregnancy, the hearing of fetus is almost equal to that of adults. By the 28th week of pregnancy, she had fully responded to sound stimulation.

2. The sound received by the baby is transmitted through the mother's abdominal wall. The abdominal wall has a reflective effect, which will reduce the sound outside by about 20 decibels. Therefore, the shouts outside spread to the baby, just like whispering. But if the pregnant mother is exposed to strong noise for a long time, the protective effect of the mother's abdominal wall is very limited. Especially for low-frequency sounds, the mother's abdominal wall has almost no weakening function, which is equivalent to the baby's auditory system directly exposed to strong noise.

Phoenix Net-High-decibel toys are a disaster for baby's health.

People's Daily Online-Strong noise will harm the hearing of the fetus, prevent deafness, and treat deafness from pregnancy.