Sound

Gap-fill exercise

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. of sound depends on waveform.
2. Echoes are caused due to the of sound.
3. is a short duration disturbance.
4. Rhinoceroses communicate with one another by using sound of frequency as low as 5 Hz.
5. The wavelength times frequency equals speed of .
6. is the maximum displacement of a particle from its mean position.
7. Sound of frequencies above 20,000 Hz is known as sound.
8. The audible range of an average human ear lies between Hz to Hz.
9. The change in density from one maximum value to the minimum value and again to the maximum value makes one complete .
10. The repeated reflection of sound that results in the persistence of sound is called as .