Both the above statements are correct.
EXPLANATION:
- The amplitude or the height of sound waves explains the effects of the sound and Amplitude is the "measure of intensity of the sound".
- Amplitude is the displacement of a particle from its mean position in either direction.
- This forms the "height of the sound wave" and thus the large value amplitude indicates more sound and a small value of amplitude results in less sound.
- If the frequency is "high than the sound" the "pitch will be higher" such that the sound with high frequency will have shrilling sound.
- For example, the "chirp of a bird" has a "higher pitch" as compared to the "roar of a lion".