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Module 1: Módulo 7: Órgãos do sistema respiratório

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A produção de discurso humano

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Human speech is a combination of a number of processes. Essentially, a column of air flows out through the oral cavity, where it is chopped into bits of speech known as phonemes.

Speech sounds produced when the oral cavity is not blocked are called vowels. Sounds resulting from the closing or chopping action of the oral cavity are known as consonants.

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The column of air vibrates at different frequencies (pitch). These vibration frequencies are gained by the air as it passes through the larynx.

The pitch is varied by a change in the tension of the vocal cords. The higher the tension, the higher will be the pitch (vibration frequency).