程式碼：

 1 # -*- coding: utf-8 -*-
 2 # @Time    : 18-10-16 下午12:20
 3 # @Author  : Felix Wang
 4 
 5 import pyaudio
 6 import numpy as np
 7 from scipy import fftpack
 8 import wave
 9 
10 
11 # 錄音
12 # 錄音必須安裝portaudio模組，否則會報錯
13 # http://portaudio.com/docs/v19-doxydocs/compile_linux.html
14 def recording(filename, time=0, threshold=7000):
 
15     """
16     :param filename: 檔名
17     :param time: 錄音時間,如果指定時間，按時間來錄音，預設為自動識別是否結束錄音
18     :param threshold: 判斷錄音結束的閾值
19     :return:
20     """
21     CHUNK = 1024  # 塊大小
22     FORMAT = pyaudio.paInt16  # 每次採集的位數
23     CHANNELS = 1  # 聲道數
24     RATE = 16000  # 取樣率：每秒採集資料的次數
25     RECORD_SECONDS = time  #
 
 錄音時間
26     WAVE_OUTPUT_FILENAME = filename  # 檔案存放位置
27     p = pyaudio.PyAudio()
28     stream = p.open(format=FORMAT, channels=CHANNELS, rate=RATE, input=True, frames_per_buffer=CHUNK)
29     print("* 錄音中...")
30     frames = []
31     if time > 0:
32         for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
 
33             data = stream.read(CHUNK)
34             frames.append(data)
35     else:
36         stopflag = 0
37         stopflag2 = 0
38         while True:
39             data = stream.read(CHUNK)
40             rt_data = np.frombuffer(data, np.dtype('<i2'))
41             # print(rt_data*10)
42             # 傅立葉變換
43             fft_temp_data = fftpack.fft(rt_data, rt_data.size, overwrite_x=True)
44             fft_data = np.abs(fft_temp_data)[0:fft_temp_data.size // 2 + 1]
45 
46             # 測試閾值，輸出值用來判斷閾值
47             # print(sum(fft_data) // len(fft_data))
48 
49             # 判斷麥克風是否停止，判斷說話是否結束，# 麥克風閾值，預設7000
50             if sum(fft_data) // len(fft_data) > threshold:
51                 stopflag += 1
52             else:
53                 stopflag2 += 1
54             oneSecond = int(RATE / CHUNK)
55             if stopflag2 + stopflag > oneSecond:
56                 if stopflag2 > oneSecond // 3 * 2:
57                     break
58                 else:
59                     stopflag2 = 0
60                     stopflag = 0
61             frames.append(data)
62     print("* 錄音結束")
63     stream.stop_stream()
64     stream.close()
65     p.terminate()
66     with wave.open(WAVE_OUTPUT_FILENAME, 'wb') as wf:
67         wf.setnchannels(CHANNELS)
68         wf.setsampwidth(p.get_sample_size(FORMAT))
69         wf.setframerate(RATE)
70         wf.writeframes(b''.join(frames))
71 
72 
73 recording('ppp.mp3', time=5)  # 按照時間來錄音，錄音5秒
74 recording('ppp.mp3')  # 沒有聲音自動停止，自動停止