Let's Get to Know the Car Horn

The horn is the sound signal device of the car. During the driving process of the car, the driver sends out necessary audio signals according to needs and regulations to warn pedestrians and draw the attention of other vehicles to ensure traffic safety. At the same time, it is also used for driving and signal transmission.

Working principle of horn

When the horn button on the steering wheel or other positions is pressed, the current from the battery will flow to the solenoid coil of the horn relay through the circuit. The moving contact switch of the solenoid coil attraction relay will be closed. And the current will flow to the horn. The current makes the electromagnet inside the horn work so that the vibrating membrane vibrates and makes a sound.

Classification

According to its sound power, the horns can be divided into the electric horns and pneumatic horns;

According to the shape, it can be divided into three types: spiral, cylinder, and basin;

It can be divided into a tweeter and woofer according to audio frequency;

It can be divided into a single-wire system and double wire system according to the wiring mode;

It can be divided into contact type (ordinary type) electric horns and contactless type (electronic type) electric horns according to whether there are contacts or not.

Among them, the air horn is mainly used on heavy trucks with air braking devices. The electric horn has the characteristics of a simple structure, small volume, light weight, pleasant sound, and convenient maintenance, so it is widely used in small and medium-sized vehicles.

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