You have to power each of them separately from 5V [ie, in parallel].If you want to analyze the sound signals, then the signal from each board should go into a separate A/D channel. However, the Arduino A/D probably isn't fast enoughto analyze normal audio signals, especially as you only have 2KB RAM to work with.If you use the DO digital output of the modules, then you can hook them into separatedigital I/O pins on the Arduino, to simply detect yes/no on presence of sounds.
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