发声物体振动产生的声波,必须经过人的外耳、中耳和内耳,然后再通过听神经传给大脑的听觉中枢后,才会使人听到声音。这个过程中的任何一个或几个环节出了毛病,听觉都会发生障碍,俗称耳聋。 耳接受声音的装置大致可分为两个部分。一部分负责把声音传导过来,包括外耳道、鼓室和咽鼓管,叫做传音装置。另一部分负 Sonic vibrations generated sound objects, must go through the human ear, middle ear and inner ear, and then through the auditory nerve to the brain’s auditory center, will make people hear the sound. Any one or several aspects of this process are out of order, hearing disorders occur, commonly known as deafness. The ear-receiving device can be roughly divided into two parts. Part responsible for the conduction of sound over, including the external auditory canal, tympanic and eustachian tube, called the sound transmission device. The other part is negative