silence_checker.py

import wave
import sys
import os
import array

if len(sys.argv) != 2:
    print("please specify the name of the folder")
    exit()
FILE_PATH = sys.argv[1]

for file in os.listdir(FILE_PATH):
    if file.endswith(".wav"):
        wav = wave.open(os.path.join(FILE_PATH, file))
        sample_width = wav.getsampwidth()
        if not sample_width in [1, 2]:
            print("{} format not supported sorry".format(file))
            continue

        frames = wav.readframes(wav.getnframes())
        if sample_width == 1:
            values = array.array('B', frames)
        else: # sample width 2
            values = array.array('h', frames)
        
        silent = True
        for v in values:
            if sample_width == 1:
                v -= 128
            if abs(v) >= 12:
                silent = False
                break
        wav.close()
        if silent:
            print("{} is silent, deleting!".format(file))
            os.remove(os.path.join(FILE_PATH, file))
        else:
            print("{} is not silent".format(file))