在智能化交通上如何做到区别噪声和汽车鸣笛声，为智能无人车的安全通畅行驶提供有力的保证。本程序通过滤波器的波形判断声波是否属于汽车鸣笛声。(In the intelligent traffic, how to make the noise and the sound of the car whistle can provide a powerful guarantee for the unobstructed driving of the intelligent unmanned vehicle. This program determines whether sound sound belongs to the sound of a car whistle through the waveform of the filter.)