Ans: In chapter sound, you will be taught about how sound plays an important role in human life. You will also learn about noise, vibration and medium to travel. Here, you will come across sound is produced by vibrating bodies, the sound produced by humans, sounds need a medium for propagation, we hear sounds through our ears, aptitude, time period and frequency of a vibration, audible and inaudible sounds, noise and music and noise pollution. You will also learn about: Sound is produced by a vibrating bodySound Produced by HumansSound Needs a Medium of PropagationWe Hear Sounds through Our EarsAmplitude, Time Period and Frequency of a VibrationAudible and Inaudible SoundsNoise and MusicNoise Pollution