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Dynamic Microphones - What are those?

Dynamic Microphones - What are those?

A dynamic microphone creates an audio signal by taking advantage of the fact that when an electrical conductor is moved through a magnetic field an electric current is induced into that conductor.


The most common type of dynamic microphone uses a moving coil to create the audio signal. In a moving coil microphone there will be a very thin membrane that picks up vibrations in the air from the audio source whether that be voice or picking up an instrument sound. The membrane is attached to the coil so when the membrane moves the coil moves too.


The coil itself is a surrounded by a permanent magnet so as the coil moves in the magnetic field the required electrical current is produced. This electrical current is then transmitted to the audio mixer or amplifier where it is amplified and eventually reaches your loudspeakers.


Dynamic moving coil microphones do not need any external power and they are normally very sturdy and robust which makes them ideal for stage use. Generally, they aren’t as sensitive as other types of microphone and can normally take a lot of abuse making them perfect for applications that involve high levels of sound. Dynamic mics are generally less sensitive to higher frequencies too so if you don’t need perfect high frequency pick up in your audio capture then a dynamic microphone is probably the way to go (and they’re normally the cheapest option too!).


As a dynamic microphone is essentially an electromagnetic device you do need to be careful if you’re using them in the presence of an induction loop system but if you need any advice on that then that’s why we are here so get in touch.


*Thanks to AudioTechnica for image


Created On  17 Jan 2018 8:28  -  Permalink

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