👉 Sifflement is a word that refers to a type of chemical reaction where two or more substances combine and form new compounds. The chemical reaction can occur in a single step, multiple steps, or even several steps, depending on the specific conditions of the reaction. Sifflement can be classified into three main types: spontaneous sifflement, incomplete sifflement, and incomplete but spontaneous sifflement. Inspiral sifflement is one of the most common forms of sifflement.