本作品是简易几何学图片，其完全包含公有财产信息，且不包含原始作者，因此著作权不适用于此并归公有领域所有。

This image is a derivative work of the following images:

• File:Blank_vowel_trapezoid.png licensed with GFDL
  • 2005-07-19T06:08:33Z Denelson83 1000x700 (5700 Bytes) More accurate version - Overcoming a perceived optical illusion
  • 2005-07-19T00:47:27Z Denelson83 1000x700 (5296 Bytes) Thinner lines
  • 2005-07-18T02:31:12Z Denelson83 1000x700 (5290 Bytes) New version, drawn to exact specifications
  • 2005-07-18T02:05:06Z Denelson83 1000x700 (18375 Bytes) Exact aspect ratio of 10:7
  • 2005-07-16T04:32:22Z Denelson83 1025x700 (19246 Bytes) Less space on the right
  • 2005-07-16T04:05:19Z Denelson83 1050x700 (19305 Bytes) Thinner lines
  • 2005-07-16T03:33:18Z Denelson83 1050x700 (19133 Bytes)
  • 2005-07-16T03:07:17Z Denelson83 1025x700 (19050 Bytes) Attempting to optimize for larger browser text sizes
  • 2005-07-16T03:05:28Z Denelson83 1025x650 (18841 Bytes) Attempting to optimize for larger browser text sizes
  • 2005-07-16T00:46:50Z Denelson83 1000x650 (18482 Bytes) Add some buffer space
  • 2005-07-16T00:27:36Z Denelson83 1000x700 (18671 Bytes) Add some buffer space
  • 2005-07-15T23:58:06Z Denelson83 878x606 (17566 Bytes) Blank vowel trapezoid, for use with the International Phonetic Alphabet. {{GFDL-self}}

• File:IPA_vowel_trapezium.svg licensed with Cc-by-sa-2.5,2.0,1.0, GFDL
  • 2009-04-17T04:07:19Z Moxfyre 980x720 (18591 Bytes) Apparently I missed some text and didn't convert it from Bitstream->DejaVu last time. *sheepish*
  • 2009-02-19T21:21:35Z Moxfyre 980x720 (18429 Bytes) fonts Bitstream->DejaVu (apparently all the IPA symbols actually come from DejaVu which is a derivative of Bitstream... whoops)
  • 2009-02-19T18:25:44Z Moxfyre 980x720 (18659 Bytes) Added example vowel markers and labels, margins with room for labels, and explanatory text, split into separate SVG layers. My goal is to make this more useful as a ''template'' for vowel charts.
  • 2009-02-19T06:05:52Z Moxfyre 882x660 (2907 Bytes) removed unused defs in the XML to reduce file size
  • 2009-02-18T21:57:03Z Moxfyre 882x660 (3165 Bytes) fixed opaque trapezoid
  • 2009-02-18T18:07:31Z Moxfyre 882x660 (3168 Bytes) {{Information |Description=Standard [[:en:International Phonetic Association|IPA]] [[:en:Vowel diagram|vowel trapezium]] template for future SVG-based vowel charts... which are mostly in raster format now :-( |Source=*[[:File

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