Using the mic with CircuitPython

I’m trying to use the onboard with with circuit python but I’m not seeing much change in ADC values as I test with soft and loud noise.

My output is staying around 35000 - 38000 based on the code below.

Am I missing something?

from time import sleep
import board
from analogio import AnalogIn

analog_in = AnalogIn(board.MIC)

while True:
    result = analog_in.value