PPT - Sound Class 8 Notes | EduRev

Science Class 8

Created by: Dr Manju Sen

Class 8 : PPT - Sound Class 8 Notes | EduRev

 Page 1


CHAPTER - 13 
 
SOUND 
Page 2


CHAPTER - 13 
 
SOUND 
Musical instruments 
Page 3


CHAPTER - 13 
 
SOUND 
Musical instruments 1) Sound :- 
       Sound plays an important part in our daily lives. It helps us to 
communicate with each other. We hear a wide variety of sounds in our 
surroundings.  
      Sound is produced by a vibrating body. Vibration is the to and fro or 
back and forth motion of an object. 
Eg :- If you strike a school bell, it vibrates and produces  sound.  
         If you pluck a stretched rubber band, it vibrates and produces 
sound. 
        If you beat a drum, its stretched membrane vibrates and produces 
sound. 
        If you blow a bugle, the air column vibrates and produces sound. 
Page 4


CHAPTER - 13 
 
SOUND 
Musical instruments 1) Sound :- 
       Sound plays an important part in our daily lives. It helps us to 
communicate with each other. We hear a wide variety of sounds in our 
surroundings.  
      Sound is produced by a vibrating body. Vibration is the to and fro or 
back and forth motion of an object. 
Eg :- If you strike a school bell, it vibrates and produces  sound.  
         If you pluck a stretched rubber band, it vibrates and produces 
sound. 
        If you beat a drum, its stretched membrane vibrates and produces 
sound. 
        If you blow a bugle, the air column vibrates and produces sound. 
2) Musical instruments and their vibrating parts :- 
Sl.No. Musical 
instrument 
Vibrating part producing sound 
1 Veena Stretched string 
2 Sitar Stretched string 
3 Violin Stretched string 
4 Tabala Stretched membrane 
5 Mridangam Stretched membrane 
6 Drum Stretched membrane 
7 Shehnai Air column 
8 Flute Air column 
9 Mouth organ Air column 
Page 5


CHAPTER - 13 
 
SOUND 
Musical instruments 1) Sound :- 
       Sound plays an important part in our daily lives. It helps us to 
communicate with each other. We hear a wide variety of sounds in our 
surroundings.  
      Sound is produced by a vibrating body. Vibration is the to and fro or 
back and forth motion of an object. 
Eg :- If you strike a school bell, it vibrates and produces  sound.  
         If you pluck a stretched rubber band, it vibrates and produces 
sound. 
        If you beat a drum, its stretched membrane vibrates and produces 
sound. 
        If you blow a bugle, the air column vibrates and produces sound. 
2) Musical instruments and their vibrating parts :- 
Sl.No. Musical 
instrument 
Vibrating part producing sound 
1 Veena Stretched string 
2 Sitar Stretched string 
3 Violin Stretched string 
4 Tabala Stretched membrane 
5 Mridangam Stretched membrane 
6 Drum Stretched membrane 
7 Shehnai Air column 
8 Flute Air column 
9 Mouth organ Air column 
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