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Question

Explain how sound is produced by the voice box in human. [3 MARKS]

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Solution

Each point: 1 Mark

1. Two vocal cords, are stretched across the voice box or larynx in such a way that it leaves a narrow slit between them for the passage of air.
2. When the lungs force air through the slit, the vocal cords vibrate, producing sound.
3. Muscles attached to the vocal cords can make the cords tight or loose. When the vocal cords are tight and thin, the type or quality of voice is different from that when they are loose and thick.


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