What is the difference between a sibilant and a fricative sound in linguistics?

In linguistics, a sibilant sound is a type of fricative sound that is characterized by a hissing or hushing quality. Sibilants are produced by directing a stream of air over the edge of the teeth. Fricatives, on the other hand, are a broader category of sounds that are produced by forcing air through a narrow channel in the vocal tract, creating friction. Sibilants are a specific subset of fricatives that have a more distinct hissing quality.