The human voice produces sounds in the following manner:
1. Air pressure from the lungs creates a steady flow of air through the trachea (windpipe), larynx (voice box) and pharynx(back of the throat).

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The larynx or voice box is a cylindrical framework of cartilage that serves to anchor the vocal folds. When the musclesof the vocal folds contract,

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The passive place of articulation is the place on the more stationary part of the vocal tract where the articulation occurs and can be anywhere from the lips, upper teeth, gums, or roof of the mouth to the back of the throat. Although it is a continuum, there are

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The articulatory gesture of the active place of articulation involves the more mobile part of the vocal tract, typically some part of the tongue or lips. The

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Consonants that have the same place of articulation, such as the alveolar sounds /n, t, d, s, z, l/ in English, are said to be homorganic. Similarly, labial /p, b, m/ and velar /k, ɡ, ŋ/ are homorganic. A homorganic nasal rule, an instance of assimilation,

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The tongue contacts the mouth with a surface that has two dimensions: length and width. So far, only points of articulation along its length have been considered. However,

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The following table shows the possible combinations of active and passive articulators.
The possible locations for sibilantsas well as non-sibilants to occur

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