CBSE Class 8 Science Activity Suno Suno

SOUND

“Suno! Suno! Can you all hear me?', shouted Nilu. 'If you shout like this the whole world can hear you', said Didi. 'I just wanted to feel my vocal chords vibrating. Our teacher told us that the vibration of vocal cords  in our throat allows us to make sound. You are able to hear me because these vibrations from my mouth  are then passed to you through air. I wish I could see these vibrations. ' said Nilu, a little disappointed.  'Sometimes you cannot see them, but you can see their effect through these activities', said Didi. 

What to do: 

1.  Blow up the balloon.

2.  Hold it against your ear.

3.  Ask your friend to press his/her lips against the balloon and speak.

You  can  hear  the  vibrations  through  the  balloon  and  can  feel  them.  One  can  feel  his/her  own  voice through his/her lips as the balloon's skin vibrates creating sound waves. 

Please refer to the link below - CBSE Class 8 Science Activity Suno Suno