The Ear

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Across
  1. 2. A thin membrane that vibrates when sound waves hit it.
  2. 5. A unit used to measure the loudness of sound.
  3. 6. loss A reduced ability to hear sounds.
  4. 7. A spiral-shaped part of the inner ear that converts vibrations into electrical signals.
  5. 9. When sound waves bounce off a surface.
  6. 10. A sound that is reflected back after hitting a surface.
Down
  1. 1. Carries sound signals from the ear to the brain.
  2. 3. The range of sounds humans can hear (20 Hz – 20,000 Hz).
  3. 4. Sound waves with a frequency higher than humans can hear (>20,000 Hz).
  4. 8. Three tiny bones in the ear that amplify sound vibrations.