The Ultimate Voiced alveolar fricative - American History Information Guide and Reference

The voiced alveolar fricative is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is z, and the equivalent X-SAMPA symbol is z.

Features

Features of the voiced alveolar fricative:

Its manner of articulation is fricative, which means it is produced by constricting air flow through a narrow channel at the place of articulation, causing turbulence.
Its place of articulation is alveolar which means it is articulated with the tip of the tongue against the alveolar ridge.
Its phonation type is voiced, which means the vocal cords are vibrating during the articulation.
It is an oral consonant, which means air is allowed to escape through the mouth.
It is a central consonant, which means it is produced by allowing the airstream to flow over the middle of the tongue, rather than the sides.
The airstream mechanism is pulmonic egressive, which means it is articulated by pushing air out of the lungs and through the vocal tract, rather than from the glottis or the mouth.

The voiced alveolar fricative occurs in English, and it is the sound denoted by the letter 'z' in zoo or the letter 's' in roses.