MEMS and bell: what they have in common

1. Step 1. MEMS — is used in — Microphone. Smartphone microphones are MEMS devices.
2. Step 2. Microphone — uses — Sound wave. It picks up sound waves.
3. Step 3. Sound wave — is used in — Alarm clock. An alarm clock wakes you with sound: the bell shakes the air.
4. Step 4. Alarm clock — has part — Bell. A bell rings.

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