如何将 Butterworth 过滤器应用于我的代码？

Question

我想过滤掉录音中的噪音并将其标准化。目前我正在努力使用巴特沃斯带通滤波器。

如何在我的代码中应用它？ （我是 Python 新手）

from numpy import nditer
from pydub.audio_segment import AudioSegment
from scikits.audiolab import wavread

from scipy import signal

# Stereo to mono
stereo_sound = AudioSegment.from_wav('voice.wav')
mono_sound = stereo_sound.set_channels(1)
mono_sound.export('voice_mono.wav', format='wav')

podcast = wavread('voice.wav')

for frame in podcast:
    print(frame)

print("\n")
print("\n")


# Read mono file
podcast = wavread('voice_mono.wav')
frames = podcast[0]
max_iter = 2000
i = 0
for frame in nditer(frames):
    i += 1
    if i < max_iter:
        print(frame)


# Apply Butterworth filter

# Do Butterworth filter and save as new wav
b, a = signal.butter(4, 100, 'bandpass', analog=True)

非常感谢！

Answer 1

您可能首先要检查您是否安装了 numpy、pydub、scikits 和 scipy。然后，您可以使用此代码创建一个函数并将您的音频文件作为输入。