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What do we do when we speak? First, we use certain parts of our body to produce an airstream inwards and outwards. This airstream is created intentionally to produce certain sounds. These sounds are transmitted as sound waves, which are perceived by a hearer.
This hearer receives the sound wave, decodifies it and, then, interprets it. “Phonetics and Phonology are concerned with speech – with the ways in which humans produce and hear speech.” (Clark & Yallop, 1990: 1) These two disciplines study the production and reception of speech sounds in all their complexity.