import array
import math
import time
import audiobusio
import board
def rms(vals):
    med = int(sum(vals) / len(vals))
    sumaMuestras = 0
    for k in range(len(vals)):
        muestra = vals[k]
        valnorm = float(muestra - med)
        sumaMuestras = sumaMuestras + valnorm * valnorm
    return math.sqrt(sumaMuestras / len(vals))
mic = audiobusio.PDMIn(board.MICROPHONE_CLOCK,
    board.MICROPHONE_DATA, bit_depth=16)
valores = array.array('H', [0] * 100)
while True:
    mic.record(valores, len(valores))
    magnitud = rms(valores)
    print(magnitud)
    time.sleep(0.2)