Have a 4 processes of speech sounds
at first, airstream process is a produced airstream from lungs called egressive airstream.Second,phonation process is a vocal cords fully opend and air easy to pass so the sounds no vibration it is called voiceless.Third,the articulatory process are produced with the tongue tip to touch the aveolar rige are called alveolar.And,finally the sounds is a without the oral cavity so the sounds have a fricative