Madhya Pradesh Police Exam Model Paper 2

The correct answer is Sound from musical instruments .

CONCEPT :

• Sound : A sound is a form of mechanical energy that is transmitted through mediums.
  • Example: sound from musical instruments, man's vocal cord, etc.
• Noise is a sound that is unpleasant or is a loud sound and causes a disturbance.
  • Sound from explosions, factories, vehicles, and a mixture of lots of voices is an example of noise.
• Music: The mixture of different frequencies resulted into an ordered sound is called music.
  • The sound from a musical instrument is an example of music.

EXPLANATION :

• Thus the Sound from musical instruments is not an example of noise . So option 4 is correct.