Perforated piano roll e sonar: o que têm em comum
- Passo 1. Perforated piano roll — faz parte de — Player piano. Perforated paper with the tune recorded on it.
- Passo 2. Player piano — é um tipo de — Piano. A piano.
- Passo 3. Piano — utiliza — Tuning fork. Tuning.
- Passo 4. Tuning fork — faz parte de — Quartz clock. Quartz shaped like a tuning fork at 32,768 Hz.
- Passo 5. Quartz clock — utiliza — Piezoelectric effect. The quartz resonator vibrates thanks to the piezoelectric effect.
- Passo 6. Piezoelectric effect — é utilizado em — Sonar. Langevin’s transducer is piezoelectric quartz.