Sound Free Lessons for Class 9th Physics
In this course you will learn
- What is Sound
- Mediums in which sound travels
- Graphical representation of sound
- Meaning and use of wavelength ,Frequency,Amplitude,Time Period
- Sonar
- Characteristics of sound
- Frequency range of hearing
- Loudness Pitch Quality
- The Human ear and its working
- Taking care of Ears
