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androidmicrophone

How to connect 2 external microphones to an Android device

I'm developing for my End Project a small android application which should be capable of gathering audio directional information.

For that, I am planning to connect the following devices:

-First, one adapter like this one, so I can isolate the microphone line: http://www.kvconnection.com/product-p/km-droid-2trs.htm

-Then a 2 to 1 jack 3.5 connector: http://www.aficam.es/images/AUDIO%20SPLITTER%20ADAPTADOR%20A%20DOBLE%20JACK%203,5%20mm.1%20M%20-%202%20H.jpg

-And then 2 mono directional microphones.
The complete schematic should be something like this:
http://imageshack.us/photo/my-images/266/sinttuloke.png/

My questions are:

-Do you see any flaws in what I have just exposed?

-Could I break something if I connect stereo instead of mono microphones into the 2 to 1 connector? Would the design still work?

Thanks a lot in advance!

Solution

  • Looking at this sketch I doubt if it will work as you want (or as I suppose you want). I am pretty sure that you can not for example make one sound louder and the second I do not know maybe lower the frequency. This is because on adapter you will connect those two lanes into one again. The second thing generally is that I am not sure (I`ve never met something like that) if this 2 to 1 thing will work with microphones. In my opinion it is designed to work with two but headphones.

    The main reason for that is the way that sound or more specific voltage flaws. In headphones you generate it in device and "duplicate" on headphones. With microphones thing is quite different. It is microphone which "produces" voltage. So in my opinion it will merge the voltage on the output.

    But I might be wrong.