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