Microphones and sound

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Across
  1. 2. harsh letters in a recording
  2. 4. energy dispensed from an electrical device ->
  3. 6. microphone good for high volumes
  4. 8. not easy to break
  5. 9. pitch
  6. 11. additional power needed
Down
  1. 1. energy taken in an electrical device
  2. 3. how loud or quiet
  3. 5. energy converter
  4. 7. microphone good for high frequency
  5. 10. sound recorded by microphones