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Sounds and Vibrations

What sounds and vibrations you hear everyday?

You live in a world filled with full of sounds. Following are some of the sounds and vibrations that we hear in our day to day life.


  • Bang of a door
  • Beat of a drum
  • Blast of an explosion
  • Bubbling of water
  • Buzz of a bee
  • Buzz of a saw
  • Chime of a clock
  • Chug of an engine
  • Clink of a coin
  • Rattling of dishes
  • Ring of a telephone
  • Rustling of leaves
  • Shuffling of feet
  • Toot of a horn


Information from different sounds


Different sounds can give us different information.




People whistle or singThey are happy
A baby criesIt is frightened, hungry or uncomfortable
People groanThey are in pain
Ring of a telephoneSomeone wants to speak to us
Ring of a doorbellThere is a visitor for us
Sirens of fire engines, police cars and ambulancesWarn people to get out of the way


How are sounds made?

Sounds are made when objects vibrate.


What is meant by vibrating?

Vibrating means moving backwards or forwards.


E.g. –

1) If you hold one end of a ruler on the table and twang the other end, you can see or feel the ruler moving backwards and forwards (or vibrating) and hear a sound.


2) If you put some small buttons on a table and bang it with your fist, the buttons will jump up and down, because the table vibrates when you bang it. 


What makes sound?

Everything that vibrates makes a sound.


How can we hear sounds?

When an object vibrates, the vibration makes the air around vibrate. The air vibrations enter your ear which you hear as sound.


Can we see the vibrations?

Yes we can, but not always.


Are all the objects that make sounds vibrating?

If something is making a sound, some part of it is always vibrating.


Human sounds and vibrations

People make many sounds with their voices.


Where does your voice come from?

Your voice comes from your throat.


How can you feel your throat vibrating?

Put one hand gently on the front of your throat and hum. You can feel your throat vibrating.


How do people make sounds?

This happens under the human respiratory system. Following parts of the human respiratory system are involved with this.


  • Mouth
  • Throat (including voice box and vocal cords)
  • Windpipe
  • Lungs


Throat with Voice Box and Vocal Cords togetherThroat with Voice Box and Vocal Cords together


windpipe diagramWindpipe Diagram


lungs diagramLungs


a) There is a voice box inside your throat.

b) This voice box includes folds of muscle called vocal cords.

c) When you speak or sing air from your lungs pass over your local cords.

d) Then the vocal cords vibrate and make sounds.


voice box diagramVoice Box and Vocal Cords


How can people change the sounds they make?

People can make the vocal cords vibrate faster or slower and change the sounds.


How can people talk?

People change the position of their mouth and tongue to shape the voice sounds into words, so then they can talk.

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