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蝉是有听觉器官的。蝉的听觉器官长在腹部的第二节附近,由比较肥厚的象丝一样的物体组成,上面布满灵敏的感觉细胞,和脑神经相连。当声波传到听觉器官上的时候,感觉细胞就把信号传递到脑子里,蝉就听到了声音。蝉既然有听觉,为什么对法布尔的砰砰枪声却无动于衷呢?这是因为,不管哪种动物的听觉器官,接受声波都有一定的频率范围。比如人耳可以听到每秒十六次到两万次之间的声波,低于这个频率的次声波和高于这个频率的超声波,我们就听不到了。……蝉对自己的同类发出的声音是十分敏感的,
There is an auditory organ. The auditorium’s auditory organs are located near the second quarter of the abdomen and consist of relatively thick silky objects covered with sensitive sensory cells and connected to the cranial nerves. When the sound waves reach the auditory organ, the sensory cells send the signal to their brains and they hear the sound.蝉 Since he has hearing, why is he indifferent to Fabre’s shotgun? This is because, no matter what kind of animal’s auditory organ, the received sound wave has a certain frequency range. For example, the human ear can hear sound waves between 16 and 20,000 times per second, and subsonic waves below this frequency and ultrasonic waves above this frequency cannot be heard. ... He is very sensitive to his own voice.