from scipy.io import wavfile
import numpy as np
import matplotlib.pyplot as plt

sample_rate, data = wavfile.read("Alarm01.wav") # 加载声音，返回采样频率，声音数据
print("Data type", data.dtype, "Shape", data.shape)

Data type int16 Shape (122868, 2)

repeated = np.array(list(data)*2) # 重复音频片段
wavfile.write("a.wav", sample_rate, repeated) # 绘制声音

plt.figure(figsize=(10,5))

plt.subplot(1,2,1)
plt.title("Original")
plt.plot(data)

plt.subplot(1,2,2)
plt.title("Repeated")
plt.plot(repeated)

plt.show()

声音数据下载：https://files.cnblogs.com/files/LiJinrun/Alarm01.zip