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Acoustic beamformer data acquisition question

Started by Tom September 21, 2003
I was looking for eight microphone inputs and something not too expensive.
I wondered (even though the application is for music) if this would fit the bill

http://www.aardvarkaudio.com/aasd-v1/products/q10-main.html

It comes with software - maybe I could create 8 .wav files with this kit and process
off-line.I don't need real-time processing at present.
Anybody used it for anything or got any other ideas?


Thanks

Tom
aberdonian_2000@yahoo.com (Tom) wrote in message news:<e1b1658f.0309211339.199adce2@posting.google.com>...
> I was looking for eight microphone inputs and something not too expensive. > I wondered (even though the application is for music) if this would fit the bill > > http://www.aardvarkaudio.com/aasd-v1/products/q10-main.html > > It comes with software - maybe I could create 8 .wav files with this kit and process > off-line.I don't need real-time processing at present. > Anybody used it for anything or got any other ideas?
One parameter to look out for, is how well the sampling in the different channels are synced. The ideal array sampling system would consist of 8 ADCs in parallel that sample in the exact same moment with neglectable "sample and hold" times. You should try to find a data sheet for this thing, and see how the sampling is done, and decide whether it suits your needs. Rune
"Tom" <aberdonian_2000@yahoo.com> wrote in message
news:e1b1658f.0309211339.199adce2@posting.google.com...
> I was looking for eight microphone inputs and something not too expensive. > I wondered (even though the application is for music) if this would fit
the bill
> > http://www.aardvarkaudio.com/aasd-v1/products/q10-main.html > > It comes with software - maybe I could create 8 .wav files with this kit
and process
> off-line.I don't need real-time processing at present. > Anybody used it for anything or got any other ideas?
I've not used that product. You didn't say how the microphones are oriented / arranged. You also didn't say if you intend to do simple summation beamforming or also intend to do beam steering. With simple summation beamforming (no delays inserted in the element (microphone) channels) you will still need to align the delays if the ADC is sequential across the channels. You might try alt.sci.physics.acoustics with your question. Fred