What words are used to describe the sounds of police cars, fire engines and ambulances respectively?

It can be described by the description in Mr. Ma's crosstalk:

1, the siren of the fire truck is three seconds long, and it goes back and forth at intervals of one second, just like Teacher Ma said: fire ~ ~ ~ ~ fire ~ ~

2. Ambulance has a high pitch of one second, a flat pitch of one second, and an interval of one second. This cycle goes back and forth. Mr. Ma described it as: alas ~ ~ yo ~ ~ alas ~ ~ ~

3. The siren of the police car is very urgent and there is no interval. Mr. Ma Lao used one word to describe it: It's over, it's over. ......

Police sirens are short and crisp, similar to "wow, wow, wow ~", with a frequency of 2~3 times per second. Give people a warning and a sense of oppression against criminals.

Ambulance sounds very long, similar to the form of heart rate pulse. The frequency of "no mile ~ no mile ~" is once a second. Mainly highlights the sense of urgency and urgency.

The sound of the fire alarm takes the longest time, especially the alarm sound of "meow, meow", the frequency is about three seconds. The voice is very low, which makes people feel that the incident is serious and urgent.

Extended data:

Provisions on the use of sirens and sign lamps by police cars, fire engines and ambulances:

Article 15 of the Road Traffic Safety Law stipulates that "police cars, fire engines, ambulances and engineering rescue vehicles shall spray logo patterns in accordance with regulations, and install alarms and sign lamps. Other motor vehicles are not allowed to spray, install or use logo patterns, alarms or sign lamps dedicated to or similar to the above-mentioned vehicles. Police cars, fire engines, ambulances and engineering rescue vehicles should be used in strict accordance with the prescribed purposes and conditions. "

The relevant departments of the state also require that the installation of warning lights for the above four special vehicles should be applied to the traffic management department, approved, processed and obtained relevant certificates before installation.

Special vehicles for highway supervision and inspection shall be equipped with unified signs and warning lights in accordance with the provisions of the Highway Law.