Python 谷歌识别器无法将语音转换为文本

我使用了try异常块，它将管理异常，但不会从语音转换为文本

    import speech_recognition as sr  # recognise speech
        import pyaudio
        r = sr.Recognizer()
        
        with sr.Microphone() as source:
            print('Say Something')
            audio = r.listen(source)
            voice_data = r.recognize_google(audio)
            print(voice_data)

说点什么
回溯（最近一次呼叫最后一次）：
文件“C:/Users/Selectigence/PycharmProjects/TalkingTom/main.py”，第8行，在
语音数据=r.recognize\u谷歌（音频）
文件“C:\Users\Selectigence\anaconda3\envs\gmco\lib\site packages\speech\u recognition\uuuu init\uuuuu.py”，第858行，在recognize\u google中
如果不是isinstance（实际结果，dict）或len（实际结果.get（“可选”，[]））==0:raise UnknownValueError（）
语音识别.未知值错误
进程已完成，退出代码为1

    Output:

        Say Something
        Traceback (most recent call last):
          File "C:/Users/Selectigence/PycharmProjects/TalkingTom/main.py", line 8, in <module>
            voice_data = r.recognize_google(audio)
          File "C:\Users\Selectigence\anaconda3\envs\gmco\lib\site-packages\speech_recognition\__init__.py", line 858, in recognize_google
            if not isinstance(actual_result, dict) or len(actual_result.get("alternative", [])) == 0: raise UnknownValueError()
        speech_recognition.UnknownValueError
        
        Process finished with exit code 1