Gramophone and gyroscope: what they have in common

1. Step 1. Gramophone — evolved from — Phonograph. A flat disc instead of a cylinder.
2. Step 2. Phonograph — has part — Diaphragm. A diaphragm with a needle.
3. Step 3. Diaphragm — is part of — Microphone. The diaphragm vibrates under a sound wave.
4. Step 4. Microphone — uses — MEMS. Smartphone microphones are MEMS devices.
5. Step 5. MEMS — is used in — Gyroscope. Phones use MEMS gyroscopes.

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