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Ari, I tried to email you offlist, but gmail thinks I am spam and bounced my message. Could you email me offlist? Thet

Exactly. Phase combination (cancellation as well as enhancement) is what changes the directivity pattern in a multiple capsule arrangement.

Wouldn't you also have to take phase difference into account for higher frequencies? It seems like a difference in arrival time of non-noise high-frequency content would undermine correlation. >

All this is correct, however, one must consider the changes in directivity pattern. Depending on the physical arrangement (side by side, colinear, back-to-back...) the results may change

The concept is that the audio signal from the capsules is correlated and the def noise is not. The math part says that adding two capsules gives you a 6dB increase in signal. But the noise only adds

I was trying to find information online but didn't find a good explanation Reading at https://acousticnature.com/journal/how-to-make-diy-sass-microphone I see Jared use 2 pair of Primo em272 per

This looks Great. And Rule number one for Microphones: The Capsule IS the microphone... (well 90%) of it. Jules

Maybe I'll make some. Took me ages to figure out how this thing was constructed geometrically. I don’t measure and copy hole patterns when I model capsules, I figure out how the patterns are

*Phil Manning* *www.foundry85.com <http://www.foundry85.com>** ~ classic recording studio* *www.artistpianocare.ca <http://www.artistpianocare.ca>* *~piano tuning & service* *Ajax studio:

There have been third party K47, k67, CK12 capsules etc, but I've never seen someone sell a K103. Would anyone buy one?

latest revision: http://halfshavedyaks.xyz/forumimages/4mic2chanV3.png Initial layout suggests that the board will be about 40mmx65mm though I will try to make it smaller. Thickness will be about 15mm

R1, R4 etc are the source resistors for the fets in the capsules. the capsules are not depicted as they wouldn't be on the board. As I mentioned earlier it might be desirable to make these trimpots,

In this case all the simulator is doing is ohms law, so it is trustworthy - purely for the avoidance of stupid mistakes rather than any great insight. I wouldn't trust it in some more complex

I'm guessing these 'simulation' programs are for the 'obedience of fools and the guidance of wise men' ?... Listing voltages to 3 decimal places is clearly nonsense. No two 'real world' examples of

OH NO the actual link is this: http://halfshavedyaks.xyz/forumimages/4mic2chanSeriesPower2.png

Yes there were some obvious stupid mistakes notably I showed 48v at the XLR pins and worked down from there which is rubbish. sorry it was really just to show the topology. I have done an improved one

I don't think the 'real world' voltages will be anything like those you've listed in your 'sim'.. Assuming a total current drain of 4mA , then each of the 4 'legs' of the feed will need to supply 1

I just noticed two conceptual errors in this rough schem. 1. opamp power consumption is not constant - it is 1.8ma per opamp quiescent, but it will increase with signal. So the opamp power needs to be

I've found that many attempts at internal frequency response corrections within the microphones? themselves can often tend to be too simplistic to be really useful. Passive filters are often the

Yes, I mean low shelf along with a high frequency notch that is needed with some cheap capsules. There are some interesting cardioids out there that don't have a very steep rolloff. Only 3dB per