How Does a Car Horn Work?

[JudahLee]

Car electric horns produce sound through the vibration of a metal diaphragm. Here is a detailed explanation of how a car horn works: 1. When the driver presses the horn switch, current flows through the contacts to the coil, generating a magnetic force that pulls the armature, forcing the diaphragm to move. The movement of the armature causes the contacts to open, interrupting the current and causing the coil's magnetic force to disappear. The diaphragm, along with the armature, returns to its original position due to its own elasticity and the action of the spring plate. 2. When the contacts close again, the circuit is reconnected, and current flows through the contacts to the coil, generating magnetic force once more, repeating the above process. This cycle repeats continuously, causing the diaphragm to vibrate and produce sound. The resonator, rigidly connected to the diaphragm, ensures smooth vibration and produces a more pleasant sound.