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Echoes of Forgotten Communication Devices is a easy crossword puzzle with 18 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.

Echoes of Forgotten Communication Devices
A crossword exploring rare and lesser-known instruments used throughout history for unique communication.
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Across
  • 1. Instrument transmitting sound without electricity
  • 2. Communication using varied drum patterns
  • 3. Knotted strings used by the Incas for data
  • 5. Signals ships with powerful rotating light
  • 7. Signal using fire on hills or towers
  • 13. Visual signaling system using flags or arms
  • 14. Nautical system using flags to communicate
  • 15. Early network for sending text messages
Down
  • 4. Bird used historically to carry messages
  • 6. Mechanical tool for encoding secret messages
  • 8. System using birds for message delivery
  • 9. Device signaling by reflecting sunlight
  • 10. Early device for long-distance text messages
  • 11. Early device that recorded and reproduced sound
  • 12. Instrument transmitting messages via rhythm
  • 16. Used historically to send audio signals
  • 17. Inventor linked to wireless telegraphy
  • 18. Ancient ram’s horn used to send sound messages
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