LookupError: Speech is unintelligible

[Abonia1]

import speech_recognition as sr
r = sr.Recognizer()
with sr.Microphone() as source:
    r.adjust_for_ambient_noise(source, duration = 5)
    print("listening...")
    # read the audio data from the default microphone
    audio_data = r.record(source, duration=5)
    print("Recognizing...")
    # convert speech to text
    text = r.recognize(audio_data)
    print(text)

---

LookupError Traceback (most recent call last)
in
8 print("Recognizing...")
9 # convert speech to text
---> 10 text = r.recognize(audio_data)
11 print(text)

~/opt/anaconda3/lib/python3.8/site-packages/speech_recognition/init.py in recognize(self, audio_data, show_all)
337 # make sure we have a list of transcriptions
338 if "alternative" not in actual_result:
--> 339 raise LookupError("Speech is unintelligible")
340
341 # return the best guess unless told to do otherwise

LookupError: Speech is unintelligible

Thanks in advance!