How does a large car horn produce sound?

[MacAlan]

Car electric horns produce sound through the vibration of metal diaphragms. Horn composition: An automotive electric horn consists of an iron core, magnetic coil, contacts, armature, diaphragm, etc. When the driver presses the horn switch, current flows through the contacts to the coil, generating a magnetic force that pulls down the armature and forces 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 under its own elasticity and the action of the spring plate, closing the contacts again and allowing current to flow through the coil once more, repeating the cycle. Horn classification: Automotive horns are divided into air horns and electric horns based on their sound power; by shape, they are classified into cylindrical, spiral, and disc types; and by frequency, they are categorized into high-pitch and low-pitch horns.