Across
- 5. wave oscillation that are parallel to the direction of the motion
- 7. strength of the sound
- 9. the amount of oscillations passing by per second
Down
- 1. length of time for one oscillation
- 2. amplitude that corresponds to brightness
- 3. amplitude that corresponds to loudness
- 4. wave oscillations that are perpendicular to the direction of motion
- 6. something associated with vibrations of matter
- 8. a requirement that is needed for sound to travel