What is the specific difference between the alarm sounds of ambulances, police cars and fire engines?

The difference between the alarm sounds of ambulances, police cars and fire engines is that the siren of fire engines is three seconds long, with one second interval and repeated cycles. Ambulances pitch for one second, pitch for one second, interval for one second, and so on. The siren of the police car is very urgent and there is no interval.

First, the three levels of ambulance alarm

The ambulance white warning is divided into three levels, which are divided into four levels: four-level blue warning, three-level yellow warning, two-level orange warning and one-level red warning. The first aid kit of portable ambulances is generally equipped with defibrillators, oxygen bags, masks, sphygmomanometers, wound dressings, oxygen cylinders, painkillers, puerperal delivery instruments, etc. , can be used for patient first aid.

An ambulance refers to a vehicle that rescues patients. The ambulance on the body is written backwards. This is to let the driver in front of the car see the word ambulance directly through the rearview mirror so as to get out of the way quickly. With the flashing of police lights and the ringing of sirens, there is no doubt that an ambulance is on its way to the emergency call site, and all the main roads will magically let it pass. Drivers can drive on the roadside, sidewalks or even in the opposite direction. As long as an ambulance can get there, just like a fireman who goes to the scene of a fire, rescuers need to race against time, because it may mean the difference between life and death.

Second, under what circumstances will the police car call the police?

The police car will also pull the alarm under the following circumstances. First, when the road is crowded and chaotic, the alarm can play a great role, and other vehicles will get out of the way for the police to catch criminals. Second, in the event of violence, the alarm can play a deterrent role. As soon as the alarm is heard, the criminals will be arrested and the violence will stop, thus giving people some sense of security.

Third, the significance of fire alarm

Fire engines, also known as fire engines, refer to vehicles designed and manufactured for firefighters to ride and equipped with various fire-fighting equipment or extinguishing agents for fire fighting, auxiliary fire fighting or fire rescue. Fire departments in most countries, including China, will also use it for other emergency rescue purposes. Fire engines can transport firefighters to the disaster site and provide them with various tools to carry out disaster relief tasks.