A sibilant's a type of fricative or affricate consonant, made by directing a jet of air through a narrow channel in the vocal tract towards the sharp edge of the teeth. The term The term sibilant's often taken to be synonymous with the term strident, though this's incorrect - there's variation in usage. The term sibilant tends to have an articulatory or aerodynamic definition involving the production of aperiodic noise at an obstacle. Strident refers to the perceptual quality of intensity as de… (More on Sibilants)