Learn more about Dynamic Microphones in this educational video with Gary Boss from Audio Technica. This video answers the questions "How does a dynamic microphone work" and "What is a dynamic microphone".
Audio Technica ATH-410: http://www.sonicelectronix.com/item_36084_Audio-Technica-ATM-410.html
Sonic Electronix: http://www.sonicelectronix.com/
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Hi, I'm Gary Boss, the National Marketing Director for Audio Technica and im here at Sonic Electronix talking about Dynamic Microphones.
All mics are transducers meaning they convert one form of energy (mechanical) into another form of energy (electrical).
I have brought an example of a dynamic mic. Microphones and speakers are very similar in design with just slight modifications done for their particular application.
Dynamic mics work by having the sound waves strike the diaphragm which causes it to move. Attached to the back of the diaphragm is a coil of wire called a voice coil. This coil moves through a magnetic field from a magnet on the back of the mic structure and generates voltage.
A fun trick is to plug a set of headphones into the input on a mixer...talk into the headphone and record it. Then plug the headphone into the headphone output and voila you are listening through the same transducer you recorded with. Speakers are not optimized to work as mics, but in some applications like intercoms they work well enough to be a speaker and mic too!
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