Labiodental consonants are most often fricatives while labiodental nasals are also typologically common. Lengthened fricatives, nasals, laterals, approximants and trills are simply prolonged. Voiceless approximants and devoiced nasals are preaspirated. The plosives have voiced allophones after nasals. This occurs with all nasals, sonorants and fricatives (except and ). Syllabic consonants in most languages are sonorants, such as nasals and liquids. Continuants contrast with occlusives, such as plosives, affricates and nasals. Japanese vowels are slightly nasalized when adjacent to nasals . Long vowels shortened before nasals in coda. Tamil is a classical language phonetically characterized by allophones, approximants, nasals and glottalised sounds. Jingpho syllable finals can consist of vowels, nasals, or oral stops. Plosives may be voiced between vowels and after nasals. There are also glottalised nasals and approximants . After nasals or , the unaspirated stops become voiced . Voiceless nasals are not found in the Leng Hmong dialect.