How does a speaker work and how is it created from a magnet?

In: Applications of magnets On: Hit: 370

A loudspeaker converts small mechanical movements caused by pressure differences in the air into electrical impulses. This is done with an electromagnetic coil and a permanent magnet.

The best speakers contain neodymium discs

To understand how a speaker works, you first need to understand what a speaker does. A speaker amplifies the voice or music. Both voice and music are generated by vibratory movements of air molecules. These vibrations of the air molecules influence the waves, with the result that there are pressure differences in the ups and downs of the waves. These sound waves are transported from the air to the human ear, which in turn, in cooperation with the brain, perceives these oscillations as music with different levels of sound.

A loudspeaker converts small mechanical movements caused by pressure differences in the air into electrical impulses. This is done with an electromagnetic coil and a permanent magnet. In most cases, magnets are used such as discs magnets neodymium, dics magnets ferrite or pots magnets neodymium.


Pot magnets Neodymium as a successful alternative for loudspeakers

A cone-shaped paper membrane is slidably mounted on its longitudinal axis. The small diameter goes in a cylindrical approach, in which a part is firmly placed. The ends of the coil are wired and can be supplied with a control current, which is generated by sound waves. The coil of the axially movable part is placed in the magnetic field of a pot magnets neodymium. The new speakers incorporate permanent neodymium magnets, as these neodymium magnets generate stronger magnetic fields than discs magnets ferrite or other magnetic materials.

 magnets for speakers

When voice or music is applied to the loudspeaker's microphone, these different sounds and sounds that can be high or low create local pressure differences in the air that propagate as sound waves. These waves of sound with their ups and downs of wave move the conical membrane and with it the coil of the piece in very short axial alternating movements. These alternate movements have an electric induction effect, because the movement takes place in the magnetic field of the permanent magnet. By induction, a small electrical current is created whose direction is constantly reversed according to the reciprocal axial movements of the conical membrane. The current passes to a controller, the device that converts electrical signals into sounds. To cover the widest possible frequency range, the speakers are usually equipped with several controllers. Larger controllers provide good low frequency sounds, such as bass. For the higher frequencies, other drivers of smaller design are responsible.

It is often necessary for complex electrical signals to be divided into smaller fractions, which are then sent to different controllers. Such distribution functions are carried out by means of small relays, which are called crossovers. The crossovers ensure an interaction with harmony of low and high tones, covering the entire frequency range.


Good suppliers of magnets of all kinds

A correct choice in the magnets, can positively influence the quality of the sound reproduction of a speaker. The use of neodymium magnets with their strong magnetic fields makes possible a pronounced gradation of the control currents in the immersion coil, with a successful result of the sound quality.

Therefore, Imagnetshop is a good supplier, not only of magnets for loudspeakers, but of all kinds of magnets, especially permanent magnets.


Although the design of the speakers has not changed in principle since its invention, its quality and sound reproduction have improved significantly over time. This improvement in the sound quality is due in particular to important components of the speaker, such as neodymium magnets. The precisely coordinated interaction of these components requires a great deal of experience and a large amount of technical knowledge, which we have acquired over many years of employment, especially in the field of magnet technology. If you need magnets for specific purposes, do not hesitate to contact us.


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