车一鸣，祖籍甘肃省通渭县人，毕业于兰州城市学院美术系(原兰州师专)。现为景德镇陶瓷画师。
这是由多普勒效应(类似一辆警车或消防车鸣着警笛从你身边经过，之后音高突然下降)引起的。
It is caused by the Doppler effect (something similar happens when a police car or fire engine with its siren blaring drives past you, and the pitch of the sound suddenly drops).
通过另一部车时必须鸣按喇叭。
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