You forgot to connect the ground, and you didn't connect the mic to Vout+ through R4. The wire to your Arduino is connected to ground instead of the output of the circuit (through the 1kΩ resistor).
You forgot to connect the ground, and you didn't connect the mic to Vout+ through R4. The wire to your Arduino is connected to ground instead of the output of the circuit (through the 1kΩ resistor).