Air is forced up from the buoy counterweight tube during downward motion causing the balls to seal the air ports in the valve, thus forcing the air to flow into the whistle. 空气在向下运动过程中受到浮标向上的推力,使阀球将阀门里的气舱密封住,这样迫使气流进入雾笛。
When the kite flies in the air, the air goes from the whistle mouth to cause the whistle issue to make a sound, and the interest is increased; 风筝在天空中飞翔时,空气从哨子口进入,使哨子发出声音,增加趣味性;
To produce a sound by expelling a current of air, as in sounding a wind instrument or a whistle. 放出空气发出声音,例如风箱声或口哨。
The air current sound generators at present include the Hartmann whistle, vortex whistle, jet-edge whistle ( resonant wedge whistle), single-hole jet rotary valve, multi-hole jet rotary valve, and so on. 目前采用的气流发声器有Hartmann哨、旋涡哨、喷注边棱哨(簧片哨)、单孔喷注旋转阀和多孔喷注旋转阀等等。