Maybe I didn’t have to shell out $100 on mics…

Its interesting that higher frequencies seem to diffract better than lower ones, and thus, give a more realistic 3D simulation. I wonder if there’s a specific frequency window where people are best at localizing sources. The older problem still persists, though – the moving sources come off to be very close to the head. Now, these aren’t simulated recordings, but actual recordings made in reverberating rooms – so why is the localization still unreal?

My first guess is analogous to power transfer and impedance matching. I am thinking that nailing the 3D audioscape would require at least hitting the ballparks on three variables: power, diffraction effects, and reverberation. Background noise or something of a baseline ‘far point’ audio source might also be useful.

Fun thought: hearing relies on differential inputs, and none of the diffraction fun would work unless we hit the common mode’s audioTransduction-Q-point? #include EE bias πŸ˜€

Wait, this post was to go with the title, too! So, I was searching for some more binaural recordings on YouTube, and I found a DIY how-to. DIY solutions are cheaper than off the shelf solutions, and though they might seem to be lower quality ‘hacks’ (where lower cost => compromised signal quality), these hacks, alongwith their customizable circuits could let me bump up the quality on these recordings. The funny thing is, on a DIY project, even a small improvement in signal quality could seem like a lot, as it might be coming on top of something that was too attenuated (read horrible) to begin with πŸ™‚

Anyway, the context for this post is this video: Very cheap binaural recording & how to do it

[ MotorGoblin ]’s description:

Published on 23 Oct 2013

How to do a binaural recording? Well, there are several techniques, but this is probably the cheapest way to get into it. It’s not an original idea, but not too common either. Professionals use expensive binaural dummy heads, e.g., Neumann KU100 that costs something like 7500 € in Europe (I’m pretty sure you could buy a real head with less money), so you might think you have to sell your house to do this, but the truth is, if you are ready to compromise a little bit, you can do it for less than 5 €. You just have to use your head. Literally.

You need two small microphone capsules in your ears. I don’t know which ones are good but what I used were Panasonic WM-034CY’s (I paid 1,31 € / piece). Electret capsules normally contain integrated preamps which need to be powered. Check out this link:
http://www.epanorama.net/circuits/mic…

I used the simplest “hack” with phantom power and only one resistor but I recommend doing it properly. I had problems with the signal being very weak and it would probably sound better with a better quality circuit anyway.

Putting electronics inside your head is always a good idea, but please, make sure your setup is safe before using it. If you have faulty gear or something… Well, I’d hate to lose viewers.

[ Powering microphonesΒ ] mirror

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