[
  {
    "severity": "MEDIUM",
    "type": "AUDIO_ARTIFACT",
    "timestamp_start": 135,
    "timestamp_end": 150.0,
    "naturalness": 3,
    "issues": [
      "robotic prosody",
      "possible mispronunciation of numeric range"
    ],
    "tone_fit": "robotic",
    "notes": "The segment sounds monotone and may lack natural human inflection."
  }
]