The Haida sound system includes ejective consonants, glottalized sonorants, contrastive vowel length, and phonemic tone. Unusually for an Indo-European language, there is a series of glottalized (ejective) stops and affricates. Although the glottalized plosives are ejectives, they are not usually strongly released. A long, glottalized, murmured, nasalized "o" with falling tone is written . The phonemic status of the glottalized sonorants is not agreed upon. The glottalized sonorants are the result of "d"-effect on the non-glottalized counterparts. He additionally reports fricative and glottalized clusters&colon; , , and . The six vowels may be nasal or laryngealized; consonants may also be glottalized. Modern Chamic languages have the Southeast Asian areal features of monosyllabicity, tonality, and glottalized consonants. Syllables without glottalized codas developed the opposite tone. Both may be glottalized ( or maybe ) in intervocalic position. Proto-Algonquian significantly reduced this system by eliminating all glottalized and aspirated phonemes. Category II vowels are longer, glottalized, and have advanced tongue root. In Haida (Bringhurst orthography), ll is glottalized . Sonorants (including vowels) may be glottalized in this fashion.