DIY Mic “EMR 10MH induction microphone (#666.013)
Our first DIY microphone (codename Purp) has been dubbed the “5024” after its capsule model name.
This one (the white ones in the picture) will be the “10MH” for the Henry (mH) rating of the inductor.
Introduction
The “10mH” is NOT an Audio microphone.
Well, it is and isn’t. Instead of a microphone capsule that captures sound waves, this uses an inductor that captures electromagnetic waves, and all in the same format as the previous microphone. So, you can make all the noise you want, sneeze, cough, it will not pick up your disgusting human sounds because those are all sound waves, not electromagnetic waves.
This little guy will make an awesome experimental soundscape induction microphone for probing electronics, circuits, etc, as it’s HIGHLY sensitive and super compact.
Assembly, reasoning
The assembly is largely the same as our first DIY mic, so I’ll leave that guide here:
https://emirizzi.com/blog/666002-diy-mic
The only difference in this circuit is the inductor instead of the AOM-5024L-HD-R electret microphone capsule. Like this diagram shows. (made with free CircuitLab.com)
This specific inductor was chosen for it’s very high sensitivity (Henry rating), low price and small enough size that it could fit into the end of an XLR connector to keep with the compact nature of these EMR line of microphones.
The same filtering circuit was used as in the 5024, as it proved perfectly applicable for recording electromagnetic interference.
I originally sourced my inductors from Amazon which I’ve started boycotting because they’re a vile corp. I’ve sourced an alternative 10mH inductor in the same format HERE or an even more sensitive one HERE.
