The data sheet from On-Semi calls out a minimum of +/- 3V so you would need a larger supply voltage and buck it down to the RPi. You might have to play with the gain (R1 and R2) depending on the mic you choose. Further, the frequency response is excellent for normal audio work but may fall well short of your needs for the bats. I don't see that as a realistic goal for such an inexpensive system as you are putting together.The design is a standard non-inverting design, the input is applied to the non-inverting input of the op-amp which is pin 3 in most cases. The input impedance is 23.5k, the overall voltage gain is determined by R2 and R1according to the following formula:
If you are speaking of the mic preamp circuit, of course, but you would probably want to have the pot in series with a fixed resistor, at least the same as the other one (R1=R2) for a minimum 1x gain. There was a homebrew amp using the same basic circuit on a you-tube clip that did that.
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