Fundamentals of Sound Engineering: Dynamic Microphones

This week we’ll start out simple by telling you about something nearly everyone has had some exposure to at one point or another: Dynamic Microphones.

These mics are, to the world of audio recording, what Nokia phones are to the cell phone scene. Sturdy, dependable – not particularly fancy or expensive in most cases, but extremely versatile…by definition, very dynamic microphones.

Dynamic mics have no internal amplifier, and don’t require batteries or any external power source. They work by using a wire coil and magnet to create an audio signal. The diaphragm of the microphone is attached to the wire coil – when this vibrates in response to incoming sound waves, the coil moves back and forth in front of the magnet, creating an electrical current, which is then channeled through wires and into an amplifier or recording device, where it becomes audible sound waves again. Another useful thing to remember when thinking about this process: dynamic mics are basically speakers…in reverse.

A more comprehensive break-down of those concepts can be found at

Here’s a good list of recommended dynamic mics based on what you could might use them for:

Hopefully that helped answer some questions you have starting out, or at least refreshed you on something you’re already familiar with- stay tuned for our next blog post, which will break down the basics of condenser mics!

-Sprout City


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