Why does the mouth make sounds?

People have many ways to communicate, such as writing letters, sending messages, drawing pictures, sending emoticons or using their hands to express through sign language.

But if we want to communicate verbally, we have to use our mouth to make sounds. The sound comes when we use air in the lungs to vibrate the vocal cords in the larynx .

Place your hands on your neck, your larynx, to feel how the vocal cords vibrate.

Want to know what is the larynx, touch the neck in the middle from the chin to the sternum, you will see a small bulge, in men sometimes clearly see this bulge and move up and down.

The air in the lungs passes through, causing the vocal cords to vibrate slightly but very quickly.

Feel when your vocal cords are vibrating by placing your hand on the voice box (like the boy in the picture below), then making a 'a' sound.

Another way to figure out how to make sounds is to imagine that your lungs are inflated balls, the knot's knots are the vocal cords. When the ball is knotted, the vocal cords close and air does not pass. When the knot is removed, the vocal cords are released and air escapes, as if we exhaled.

But if you extend the knot, the air will pass slowly, vibrating the stem and making a sound.

Similarly, your vocal cords vibrate and make sound.

After that, the sound continues to change as it passes through the throat to the mouth and nose. Now you can control this sound flow with your lips, tongue, teeth and throat to create different sounds.

For example, when you say 'a' you are controlling the vocal cords with your mouth open and using your palate to block air, preventing air from reaching your nose. If you say 'ê' or 'ô', the air still vibrates in the oral cavity but you have changed the mouth shape (shape, position of the lips), so the sound is no longer 'a'.

When you speak foreign languages, some sounds are made without vocal cords. For example, try pronouncing 'ssss' and 'zzzz' to see the difference. When pronouncing these two sounds, the shape of the mouth and the position of the tongue, lips, teeth and palate are the same but the 's' doesn't use vocal cords like the 'z' sound.

Try saying these two sounds aloud again so you can feel more clearly when your throat vibrates.

When we whisper, the sound is emitted in another way. At that time, we did not use vocal cords but brought air from the lungs to the mouth, tongue and lips.

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