启功讲他有次坐火车,听到“突突——突突”两高两低的响声,产生了一种感觉,于是去请教了一个搞音乐的邻居。启功说:“火车机器的声音,应该是匀称的,不可能有高有低。为什么我耳朵听起来,好像有高有低。”他的邻居说:“这是你凭自己的感觉来解释声音,事实上机器的声音没有高低,是人的听觉习惯觉得它有高有低,有强有弱。”然后开始发挥了。“人的呼吸跟人的心脏的跳动,常常使人感觉到火车的声音突突—— Qigong said he was on a train for a while, and he heard a ”bump - bump“ two high and two low sound, resulting in a feeling, so went to consult a neighbor who engaged in music. Qigong said: ”The voice of a train machine should be well-proportioned and impossible to be high or low. Why does my ear sound like a high and a low.“ His neighbor said: ”This is your own Feeling to explain the sound, in fact, the machine’s voice is not high and low, the human hearing habits that it is high and low, strong and weak. “And then began to play. ”People’s breath with the beating of the human heart, often make people feel the sudden sound of the train -