Solution de système de sécurité et de surveillance MCCTV Actualités de CCTUNG — Speaker

Speakers make sound by using magnetism and electric current to move air, creating sound waves.

Inside a speaker, there is a strong magnet that stays in place. A coil of wire, called the voice coil, sits in a small gap near this magnet and is attached to a thin surface called the diaphragm. When an audio signal is sent to the speaker, electricity flows through the voice coil. This creates a magnetic field, turning the coil into a temporary magnet.

Since the audio signal is always changing, the voice coil’s magnetism changes too. This makes it push and pull against the fixed magnet. As a result, the voice coil moves back and forth, carrying the diaphragm with it.

The diaphragm’s movement pushes the air, making areas of high and low air pressure—these are sound waves. When these waves reach our ears, we hear sound.

The speed of the voice coil’s movement depends on the audio signal. A fast-moving coil creates high-pitched sounds, while a slow-moving coil makes low-pitched sounds.

In short, electricity creates a magnetic force, which moves the voice coil, which moves the diaphragm, which moves the air—turning electrical signals into sound.