Across
- 1. The distance from the peak on one wave to the peak on the next wave.
- 3. To increase the amplitude of a sound so that it sounds louder.
- 5. The vibrations are at right angles to the direction the wave moves.
- 8. The outside part of the ear that we can see.
- 9. The bottom of a wave.
- 10. The part of a longitudinal wave where the air particles are spread out.
- 11. The device that absorbs the sound waves.
- 12. Something that moves backwards and forwards.
Down
- 2. A device that gives out light or sound.
- 4. A property of sound determined by its frequency.
- 6. Using ultrasound and reflections to detect objects underwater.
- 7. A wave where the vibrations are in the same direction as the direction the wave moves.