Transmission (gearbox) and headphones: what they have in common

1. Step 1. Transmission (gearbox) — includes — Automatic transmission. A gearbox.
2. Step 2. Automatic transmission — has part — Planetary gear. Planetary gear sets.
3. Step 3. Planetary gear — is part of — Wind turbine. A gearbox raises the speed.
4. Step 4. Wind turbine — has part — Neodymium magnet. Direct-drive generators.
5. Step 5. Neodymium magnet — is a kind of — Permanent magnet. A kind of magnet.
6. Step 6. Permanent magnet — is part of — Headphones. A magnet moves the diaphragm.

Open Evothings