本程序是用51单片机驱动喇叭来模拟救护车的声音，利用了中断功能，程序简单稳定，效率高，是一种非常好的程序。-This procedure is used to simulate the 51 single-chip driver horn sound of an ambulance using the interrupt function, the program is simple and stable, high efficiency, is a very good program.