Today’s car horns function just as they were in cars a hundred years ago. What may change is the horn. Cars have different sounds, for example, a small car or a budget car have a beep sound. Expensive or large vehicles may have softer and louder bass.
The train horns also sound different and quite loud due to the loud noise of the diesel engine.
No matter how noisy they are, they work similarly.
Horn is mostly round shape, black. It installs on the front of the car, such as behind the bumper, in front of a radiator, or in the wheel arch. It depends on the vehicle’s make and design.
The circular housing of the horn is equipped with an induction coil behind it, and it has a diaphragm on the front. When you press the horn at the steering wheel, the electric current will flow through the fuse and relay to the induction coil. The induction coil behind the horn will pull the diaphragm back and release it rapidly bounce back, and pull it again as long as the hand is pressing the steering wheel horn switch.
The rapid movement of the diaphragm creates a high-frequency movement of air and causes a sound to pass through the front cavity of the horn, creating a continuous sound that you can hear.