phon- photo- tele-

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Across
  1. 3. Mail that goes faraway
  2. 7. Hearing sound through your ear
  3. 8. Using light to copy paper
  4. 9. Chemistry action of light
  5. 11. Communicating from far away
  6. 14. A device for transmitting sound
  7. 16. Study of sounds used in speaking
Down
  1. 1. Far
  2. 2. An image of a person or object
  3. 3. Having a conference faraway
  4. 4. A device used to make sound louder
  5. 5. Hearing sound through an earpiece that goes on your head
  6. 6. Light
  7. 9. Plants using light as a source of energy
  8. 10. Using a scope to see things close up
  9. 12. A portable telephone
  10. 13. A TV broadcast
  11. 15. Sound