Rhotic variation and contrast in Veracruz Mexican Spanish. Bradley, T. G and Willis, E. W Estudios de Fonética Experimental, 21:43-74.
Rhotic variation and contrast in Veracruz Mexican Spanish [link]Paper  abstract   bibtex   
Phonetic studies of Spanish rhotics report a wide range of allophonic variants of the syllable-initial trill /r/, which raises the question of whether the intervocalic contrast between /r/ and the tap /ɾ/ has been neutralized in many dialects. This study presents a spectrographic analysis of syllable-initial rhotics as produced by ten speakers of Veracruz Mexican Spanish in a guided, semi-spontaneous speech task. Trills that show a reduction in the degree of lingual trilling usually contain an approximant phase following one or two lingual contacts, which we represent as [ɾɹ] or [rɹ] in narrow transcription. Intervocalic taps show both reduction and elision, but those with a measurable contact are short enough to maintain an acoustic difference with the longer allophones of /r/. Taken with recent studies of rhotics in Dominican Spanish, these findings suggest that the contrast between /r/ and /ɾ/ can be maintained in terms of overall segmental duration even when there is no difference in the number of lingual contacts.
@article{bradley_rhotic_2012,
	Author = {Bradley, Travis G and Willis, Erik W},
	Date = {2012},
	Date-Modified = {2017-02-07 12:05:59 +0000},
	Journal = {Estudios de Fonética Experimental},
	Keywords = {acoustic phonetics, América, consonants, geographical variation, México, phonetics, rhotics, segmental, Spanish},
	Pages = {43-74},
	Title = {Rhotic variation and contrast in Veracruz Mexican Spanish},
	Url = {http://www.raco.cat/index.php/EFE/article/view/260320},
	Volume = {21},
	Abstract = {Phonetic studies of Spanish rhotics report a wide range of allophonic variants of the syllable-initial trill /r/, which raises the question of whether the intervocalic contrast between /r/ and the tap /ɾ/ has been neutralized in many dialects. This study presents a spectrographic analysis of syllable-initial rhotics as produced by ten speakers of Veracruz Mexican Spanish in a guided, semi-spontaneous speech task. Trills that show a reduction in the degree of lingual trilling usually contain an approximant phase following one or two lingual contacts, which we represent as [ɾɹ] or [rɹ] in narrow transcription. Intervocalic taps show both reduction and elision, but those with a measurable contact are short enough to maintain an acoustic difference with the longer allophones of /r/. Taken with recent studies of rhotics in Dominican Spanish, these findings suggest that the contrast between /r/ and /ɾ/ can be maintained in terms of overall segmental duration even when there is no difference in the number of lingual contacts.},
	Bdsk-Url-1 = {http://www.raco.cat/index.php/EFE/article/view/260320}}
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