幻聴

1. Origins, structure, and basic meaning

• Structure: 幻聴 (げんちょう) is hearing sound without an external source. It appears as suffered symptom and diagnostic possibility.
• Basic usage: A fictional character is troubled by voices in an empty room; a doctor asks whether a heard voice was hallucinatory.

2. Common pitfalls and similar expressions

• Symptom suffered and possibility assessed
  • に悩まされた presupposes the symptom; かどうか leaves classification open. The second does not confirm a diagnosis.