Dynamic drivers are one of the most standard drivers used in the headphones. You can mostly find them in all types of headphones, whether they are high end or cheap. We think they' re mostly popular due to their simple design and operation!
The main components of a Dynamic Driver are:
1/ Neodymium electromagnet
2/ Voice Coil
Most traditional Dynamic Drivers work with an electromagnet with a coil attached to the diaphragm. The main concept is based on Faraday' s law of electromagnetic induction, where when an electric current passes through a wire, it induces an electric field around the coil. You might remember it from 8th grade!
In the case of dynamic drivers, the coil of wire is extremely thin. The electric current signal from your device passes through this coil which sets up a magnetic field around the wire. The magnetic field of this wire reacts with the magnetic field of the electromagnet
This results in a to-and-fro movement of the coil which is attached to the diaphragm. The diaphragm, in turn, vibrates. The vibration creates a compression and decompression of the airwaves which produces sound.
The Dynamic drivers are also called moving coil drivers as the coil is forced to move. You might be confused at how this makes different sounds. Well, to lay it down in simpler terms, the harder the diaphragm vibrates, the larger the air displacement and so the greater will be the volume. This is exactly why dynamic drivers have such a strong bass response as they can effectively displace air. Examples can be found in many Sony Dynamic headphones which have a better bass response.