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声音是空气的一种振动,它有压力。它传入人耳,经过外耳、听道,使中耳内鼓膜发生振动,再引起内(?)的淋巴液发生位移,最后激动听觉神经末梢的纖毛,这种激动傳到大脑皮層中,就形成了听觉。由于经常刺激大脑皮層的结果,就形成了大脑皮層的反射。大脑神经中樞调节声带的松紧长短而改变声带固有频率,使人能够发出高低、强弱不同的声音,形成了语言。如果听觉失灵,自己说了些什么都不知道,那就不能说话。婴孩不能说话,主要是因为大脑皮層没有受到过很多的语言的刺激,没有很好地建立起大脑皮
Sound is a vibration of the air and it has pressure. It is introduced into the human ear and passes through the external ear and hearing, causing the tympanic membrane in the middle ear to vibrate, causing the displacement of the lymphatic fluid in the middle, and finally excites the cilia of the auditory nerve endings. This excitement is transmitted to the cerebral cortex. Formed hearing. As a result of frequent stimulation of the cerebral cortex, a reflex of the cerebral cortex is formed. The nerve center of the brain regulates the length of the vocal cords and alters the natural frequency of the vocal cords, enabling people to send out sounds of different heights and strengths to form a language. If hearing fails and you don’t know what you said, then you can’t speak. The baby can not speak, mainly because the cerebral cortex has not been stimulated by many languages, and the cerebral cortex has not been well established.