This is the sixteenth of the twenty-four consonant sounds in our British English phonetic chart.
A consonant is a basic speech sound in which the breath is at least partially obstructed and which can be combined with a vowel to form a syllable.
This consonant sound is found in words like vision /ˈvɪʒən/, incision /ɪnˈsɪʒən/, decision /dɪˈsɪʒən/.
This consonant sound is voiced. It is known as a fricative. Fricatives disrupt the flow of air around parts of the mouth. In this case the air is disrupted by bunching up the tongue. Its unvoiced counterpart is /ʃ/.