Across
- 1. Frequency is expressed in this
- 3. A disturbance that transfers energy
- 7. A change in the observed frequency of a wave
- 9. A system that uses sound waves to determine the location of objects
- 10. The material through which a wave travels
- 11. A reflected sound wave
- 13. The particles of a medium vibrate in the same direction that the waves travels the same direction
- 14. A device that does not need a cord
- 16. Use of echoes or reflected sound waves to find objects
- 18. When two or more waves overlap and combine to form one wave
- 20. The speed at which a wave travels
- 21. A measure of how far the particles in the medium move away from their normal rest position
- 24. How many cycles occur in a amount of time
Down
- 2. A wave of energy that is sent through wires
- 3. The time required for one cycle
- 4. Involing sound waves with a frequency above the upper limit of human hearing
- 5. Waves that have frequencies greater than 20,000 Hz
- 6. When a sound wave matches the natural frequency of a object
- 8. The most common unit to used to express loudness
- 12. A wave of energy that is sent through the air
- 15. The distance from any point on a wave to an identical point on the next wave
- 17. A wave of energy
- 19. A longitudinal wave that is caused by vibrations
- 22. How high or low you think a sound is
- 23. A measure of how well a sound can be heard