21. Some speakers with more dramatic glottalization have a glottal stop closure in the middle of the vowel ( i . e . as ). 22. According to Wells, this pre-glottalization originated in the 20th century ( at least, it was not recorded until then ). 23. In Danish ( except for some southern dialects ), the pitch accent of Swedish and Norwegian corresponds to the glottalization phenomenon known as st�d. 24. In many British English dialects, a different lenition that affects only [ t ] takes place : > ( see T-glottalization ). 25. It is denoted variously with a superscript glottalization symbol ?, a glottal stop symbol ?, or simply as the laryngeal cover symbol H. 26. The R represents a sonorant, the S a fricative, the T a stop or affricate, and the a glottalization of the preceding segment. 27. Glottalization can only occur on vowels or sonorants and only in one or two-syllable words and is realized in transcription as a ['].28. "T "-glottalization is believed to have been spreading in Southern England at a faster rate than " th "-fronting. 29. Recent studies ( Milroy, Milroy & Walshaw 1994, Fabricius 2000 ) have suggested that " t "-glottalization is increasing in RP speech. 30. It likely involved glottalization at some stage, as a similar articulatory feature is found in the Latvian " broken tone ", which is a reflex of it.
