The "sj"-sound ( ) is a voiceless fricative phoneme found in most dialects of the sound system of Swedish. It has a variety of realisations, whose precise phonetic characterisation is a matter of debate, but which usually feature distinct labialization. The sound is represented in Swedish orthography by a number of spellings, including the digraph from which the common Swedish name for the sound is derived, as well as , , and (before front vowels) . The sound should not be confused with the Swedish "tj"-sound , often spelled , , or (before front vowels) .