1. What do you meant by vibrations? 2. What is the other name for larynx?
3. Do all animals produce sound by vocal chords?
4. Write the unit of frequency.
5. What do you mean by noise pollution?
6. What is the loudness of a normal conversation?
7. Explain importance of sound in our daily life.
8. Name the organ in human that produces sound. How does it work?
9. Prove that sound travels in solids too.
10. How does loudness of sound is affected by amplitude?