Flute embouchure hole and radar: what they have in common

1. Step 1. Flute embouchure hole — is part of — Flute. A stream of air is split against an edge.
2. Step 2. Flute — uses — Sound wave. Sound.
3. Step 3. Sound wave — is used in — Echo sounder. A sound pulse.
4. Step 4. Echo sounder — evolved into — Sonar. Echolocation.
5. Step 5. Sonar — works like — Radar. The same echolocation principle: sound in water instead of radio waves.

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