The human voice.

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Across
  1. 4. Muscle that takes the air in and out
  2. 5. The voice is the best instrument to create...
  3. 7. Sound gets amplified and embellished there
  4. 9. They vibrate in order to produce sound
  5. 11. Lets us know what or who is sounding
  6. 13. Lowest pitch male voice
  7. 14. Every voice is...
  8. 15. Technique to sing high pitch notes
Down
  1. 1. They use it to identify criminals
  2. 2. Easily expressed by using our voice
  3. 3. Pavarotti is a...
  4. 6. Necessary before singing
  5. 8. Highest pitch female voice
  6. 9. The most complex and expressive instrument
  7. 10. Vocal chords like this make high pitch sounds
  8. 12. Vocal chords like this make low pitch sounds