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Re: Trills (was: "Proposed IPA" characters not in Unicode)

From:Paul Roser <pkroser@...>
Date:Monday, January 22, 2007, 2:49
On Fri, 19 Jan 2007 21:52:07 -0600, Eric Christopherson <rakko@...>

>On Jan 19, 2007, at 5:06 AM, John Vertical wrote: > >> Eric Christopherson wrote: >>> What's being trilled, then, when you pronounce a uvular trill? >>> (I've never been clear on why some languages have a uvular trill >>> or fricative or approximant but not a velar one.) >> >> The uvula. Can't generalize that to just any POA, can you? > >Ah -- so with say a coronal trill, the tongue is moving against the >roof of the mouth, but in a uvular trill the uvula is moving and the >tongue stays stationary?
The few detailed descriptions I've read describe the back of the tongue forming a groove in which the uvula vibrates. Trills occur when the thing that is trilled is held just loosely enough that air-pressure (the Bernouilli effect) can cause it to vibrate. Four things (not counting the glottis or aryepilgottal folds) can trill: the lips, tongue tip, tongue edge (a 'lateral trill', described by Catford, but otherwie not often mentioned in the phonetic literature), and the uvula. For labial trills I think there are three or four possibilities: * bilabial (both lips vibrate); * labiodental (lateral channel cause upper lip to vibrate against teeth) * linguolabial (lower kip vibrates against underside of tongue) * labiolingual (upper lip vibrates against tongue tip/blade - though this might also actually be an interlabial trill, where the tongue tip protrudes between the lips and vibrates) The last two are variations of the Bronx cheer or raspberry. --Bfowol