In the morning, the school always hears someone singing a drama. The voice was very small, but many people heard it and no one was singing. Is it haunted here?

It's possible. Oh! If you say ghosts, it should be influenced by the buildings before your school was founded. Maybe someone died there before your school was established. Or fooling around in your school. Unless there's something hidden in your school. I suggest you bring some Feng Shui masters or Taoist priests to have a look.

On science? . . It may be the influence of some wind. That's why it attracts some music-like sounds. It may also be that someone is playing music near the school, but because of the angle problem, you can't hear clearly or the distance is unknown.

But according to the description, it is more likely to be haunted here. Remember to bring some religious things at any time.