Käännettävä sana (suomeksi tai englanniksi):
- Referring to a sound that has no visually identifiable cause.
- Referring to Pythagorean disciples who for years listened to his lectures from behind a curtain, unable to see him.
- (lb, en, music) Referring to pre-recorded music that is presented in concert using loudspeakers, e.g. some types of computer music.