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[ʝ̞] and [j] are two different segments, but they have to be labelled as voiced palatal approximant consonants. I think that the former is a real consonant, whereas the latter is a semi-consonant, as it has traditionally been called in Spanish, or a semi-vowel, if preferred. The IPA, though, classifies it as a consonant."
It is unusual for a language to contrast a semivowel and a diphthong containing an equivalent vowel, [citation needed] but Romanian contrasts the diphthong /e̯a/ with /ja/, a perceptually similar approximant-vowel sequence. The diphthong is analyzed as a single segment, and the approximant-vowel sequence is analyzed as two separate segments.
When adjacent to another vowel, or another yod, may be distinguished from by the addition of a dot below. Thus the word Yidish 'Yiddish' is spelled ייִדיש. The first yod represents [j]; the second yod represents [i] and is distinguished from the adjacent [j] by a dot; the third yod represents [i] as well, but no dot is necessary.
Some approximants resemble vowels in acoustic and articulatory properties and the terms semivowel and glide are often used for these non-syllabic vowel-like segments. The correlation between semivowels and vowels is strong enough that cross-language differences between semivowels correspond with the differences between their related vowels. [7]
In broad transcription, the symbol for the palatal approximant, j , may be used for the sake of simplicity. The voiced palatal fricative is a very rare sound, occurring in only 7 of the 317 languages surveyed by the original UCLA Phonological Segment Inventory Database [ citation needed ] .
The palatal glide /j/ is also phonetically between an approximant [j] and a fricative [ʝ]. Hoijer (1945a) compares it to English [j] with a "slight but audible 'rubbiness' or frication." The contrast between velar /ɣ/ and palatal /j/ is found before both back vowels /a, o/ as the following contrasts demonstrate:
Other English sounds, the vowels and sonorants, are normally fully voiced. However, they may be devoiced in certain positions, especially after aspirated consonants, as in c o ffee , t r ee , and p l ay in which the voicing is delayed to the extent of missing the sonorant or vowel altogether.
Phonetic palatalization of a consonant sometimes causes surrounding vowels to change by coarticulation or assimilation. In Russian, "soft" (palatalized) consonants are usually followed by vowels that are relatively more front (that is, closer to [i] or [y]), and vowels following "hard" (unpalatalized) consonants are further back.