Across
- 2. time taken for one vibration cycle
- 4. sound beyond 20000Hz
- 5. loudness is determined by it
- 7. soundbox of humans
- 9. frequency of a sound
Down
- 1. ____is expressed in Hertz
- 2. musical instrument with stretched membrane
- 3. musical instrument based on water
- 6. sound cannot travel through it
- 8. unpleasant sound