tercel
2008-06-30 17:10:15 UTC
I want to develop a 32 channel microphone array. My lab has 4 PXI-6123 DAQ devices, and 32 channels to analog input. We have to use simple eletret microphone as sensor, and the sensitivity is very low. The output voltage cann't be inputed by the 6123 DAQ (the Guide of DAQ indicates the minimum scale is -+1.25v), I think it should have a voltage preamplifer before inputing by DAQ. Can you suggest some advice how to connect my system, using the above mentioned devices ? Do NI have some devices with the function? Thank you!