Why play music when the sprinkler is watering

In order to complete the watering operation smoothly, together with the pedestrians to avoid timely, through the method of playing music to remind us. This can achieve better results. Water truck to understand the music is generally more happy and bright music, such music style is relatively simple to let people bear, these songs can bring good mood for people, if the water is not angry. These songs have a soothing and soothing effect.
Some people wonder why it always plays children's songs or old songs, and why it can't replace some popular songs that we all like to listen to. In response to this question, the sanitation workers say that the replacement music will affect the effect of the prompt.

They had considered the problem of changing songs before, but the watering car had always come with the music of the equipment since it was purchased, and the songs inside were fixed. The watering car comes with music its own function is to prompt the public to avoid, be careful to let the water splash on the body, if frequent replacement of music, will lose the original effect, heard before not heard of the music, the public will be too late to respond is the watering car, so that simply cause safety problems. It's like a conditioned reflex.

Some people will ask watering car Ming speaker can also ah, why must put music? In fact, in some cities, it is not allowed to honk loudly, which is attributed to noise pollution. So the watering car through the music, and is the eternal form, every street and alley are ringing the same understanding of the melody, a long time, naturally know that the watering car is coming, citizens will be early to hide far away.