This is the fifth 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 chess /ʧes/, cheese /ʧi:z/, touch /tʌʧ/
This consonant sound is called an affricate. Affricates combine properties of plosives and fricatives. That is they release air trapped by parts of the mouth and they disrupt this flow of air afterwards. This consonant sound is made by releasing a sudden blast of air. It is unvoiced. Its voiced counterpart is /ʤ/.