Instructables

Binaural Earbud Microphone AKA holophonic, 3d stereo, bin-aural microphones. For less than $10

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"The Ear Mic"


In this Instructable I will show you how to create a pair of Binaural Microphones that can be worn in your ears. All you need is an old pair of Earbuds, 7 bucks and some basic soldering skills.

I use these all the time with my camera, some of the best stereo recording you can get for a fraction of the cost.

What is Bin-aural audio you may ask?

"Binaural recording is a method of recording sound that uses two microphones, arranged with the intent to create a 3-D stereo sound sensation for the listener of actually being in the room with the performers or instruments."

Essentially this effect is possible because of how our brain interprets the sound that we hear. The subtle changes in how long it takes for sound to reach one ear before another and the intensity of that sound allows our brains to interpret where that sound is coming from and how far away it is. It's incredable that this can be replicated with only two microphones, but we also only have two ears.

Listen to this famous audio clip "Virtual Barber Shop" with your headphones on to experience the effect.


 
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Step 1: What You Need

Picture of What You Need
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The project is fairly simple as is the parts list.

Parts:
Earbud: Free - $20 (preferably the ear wrap style, normal ear-buds will not work as well if you intend to wear these.) I believe this is similar to the pair I used .
2 x PC-Mount Condenser Microphone Element: - $3.19 can be found at Radio Shack. Heres A link .
Packing Foam: Free - ??? Not sure where to buy the stuff. It is optional, used as a a good wind screen.

Thats it!

Tools Needed:
Soldering Iron with solder.
Wire stripper or scissors
Hot glue gun
gottesmd1 year ago
Ok, I got the exact parts you mentioned and soldered them up nice and clean. and nothing. no sound. no signal. not to an iphone. not to audacity on my laptop. what am i doing wrong?
amandamarth2 years ago
Hey any reason why I'm only getting input from one side of the mic??
ANDY!2 years ago
Works, until it broke! ;)
Great idea and instructable.
I think some might work because it needs extra voltage or something because the second set I made was too quiet. Well, I think I fixed it. Thanks!
yayas_22 years ago
It´s awesome! I made it and it really works. Thanks.
mischka2 years ago
I always wanted to make one of those. Good Instructable.
rimar20002 years ago
Awesome!

Simple, easy, cheap, fast, efficient. The rain sound over the leaves is very nice.
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