Science true or false

State whether the following statements are true or false:
Noise pollution may cause partial hearing impairment.

State whether the following statements are true or false:
The lower the frequency of vibration, the higher is the pitch.

State whether the following statements are true or false:
Sound cannot travel in vacuum.

State whether the following statements are true or false:
The number of oscillations per second of a vibrating object is called its time-period.

State whether the following statements are true or false:
Unwanted or unpleasant sound is termed as music.

State whether the following statements are true or false:
If the amplitude of vibrations is doubled, the loudness of sound also gets doubled.

State whether the following statements are true or false:
If the amplitude of vibrations is large, sound is feeble.

State whether the following statements are true or false:
When the amplitude of vibrations is halved, the loudness of sound becomes one-fourth.