GLONASS and telephone: what they have in common

1. Step 1. GLONASS — uses — Atomic clock. Atomic clocks.
2. Step 2. Atomic clock — evolved from — Quartz clock. The quartz oscillator is tuned to an atomic standard.
3. Step 3. Quartz clock — uses — Piezoelectric effect. The quartz resonator vibrates thanks to the piezoelectric effect.
4. Step 4. Piezoelectric effect — is used in — Microphone. Piezo microphones turn sound pressure into voltage.
5. Step 5. Microphone — is part of — Telephone. The handset microphone turns the voice into an electrical signal.

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