Alexander Graham Bell

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Across
  1. 3. To say again
  2. 4. Sound navigation
  3. 5. No sound at all
  4. 8. Study of hearing
  5. 9. Unable to talk
  6. 10. Adjust sound
Down
  1. 1. Connected calls before
  2. 2. Starts every invention
  3. 6. Part of a headset
  4. 7. Opposite of quiet