Take a deep breath. Now let it out slowly and say “Ahhhhh”. You will only be able to make this sound while there is air in your lungs. When you run out of air, there will be no sound. This shows you how important your lungs are for talking.
Have you ever notice the small bump on your neck beneath your chin? That’s your voice box, or larynx. Your larynx is like a box with two pieces of tissue stretched across it. The pieces of tissue are your vocal cords. When you talk or sing, air from your lungs is pushed through the opening between your vocal cords. This makes your vocal cords shake, or vibrate, they make a sound.
By using muscles to change the size and shape of the spaces inside your mouth and throat, you can make all kinds of sounds. You can talk and sing. You can even bark like a dog.
See for yourself how the voice box works. With an adult‘s permission, blow up a balloon. Then pinch the neck closed, so no air escapes. Do you hear anything? You should not. Now stretch the neck of the balloon to make a narrow slit. What do you hear? As the air escapes, it makes a squealing sound.
Picture Credit : Google
