Vowel diagram

Each vowel in the vowel diagram has a unique first and second formant, or ''F''₁ and ''F''₂. The frequency of the first formant is associated with the width of the [[pharyngeal cavity]] and the position of the tongue on a vertical axis, and ranges from open to close. The frequency of the second formant refers to the length of the oral cavity and the position of the tongue on a horizontal axis. {{IPA|[i]}}, {{IPA|[u]}}, {{IPA|[a]}} are often referred to as point vowels because they represent the most extreme ''F''₁ and ''F''₂ frequencies. {{IPA|[a]}} has a high ''F''₁ frequency because of the narrow size of the pharynx and the low position of the tongue. The ''F''₂ frequency is higher for {{IPA|[i]}} because the oral cavity is short and the tongue is fronted in the mouth. The ''F''₂ frequency is low in the production of {{IPA|[u]}} because the mouth is elongated and the lips are rounded while the pharynx is lowered.{{cite book |title=Fundamentals of Psycholinguistics |url=https://archive.org/details/fundamentalspsyc00fern |url-access=limited |author=Eva M. Fernández and Helen Smith Cairns |year=2011 |publisher=Wiley-Blackwell |isbn=9781405191470 |pages=[https://archive.org/details/fundamentalspsyc00fern/page/n173 158]–159}}

Each vowel in the vowel diagram has a unique first and second formant, or ''F''₁ and ''F''₂. The frequency of the first formant is associated with the width of the [[pharyngeal cavity]] and the position of the tongue on a vertical axis, and ranges from open to close. The frequency of the second formant refers to the length of the oral cavity and the position of the tongue on a horizontal axis. {{IPA|[i]}}, {{IPA|[u]}}, {{IPA|[a]}} are often referred to as point vowels because they represent the most extreme ''F''₁ and ''F''₂ frequencies. {{IPA|[a]}} has a high ''F''₁ frequency because of the narrow size of the pharynx and the low position of the tongue. The ''F''₂ frequency is higher for {{IPA|[i]}} because the oral cavity is short and the tongue is fronted in the mouth. The ''F''₂ frequency is low in the production of {{IPA|[u]}} because the mouth is elongated and the lips are rounded while the pharynx is lowered.{{cite book |title=Fundamentals of Psycholinguistics |url=https://archive.org/details/fundamentalspsyc00fern |url-access=limited |author=Eva M. Fernández and Helen Smith Cairns |year=2011 |publisher=Wiley-Blackwell |isbn=9781405191470 |pages=[https://archive.org/details/fundamentalspsyc00fern/page/n173 158]–159}}

''F''₁ and ''F''₂ are not the only formants used to measure vowels. The third formant, or ''F''₃, is also often used for measuring vowel quality, but it is not typically demonstrated on a dual-axis chart as ''F''₁ and ''F''₂ are. The lowering of ''F''₃ is commonly associated with [[front rounded vowel]]s, such as {{IPAblink|œ}}, and [[r-colored vowel]]s, such as {{IPAblink|ɚ}}; the latter to a greater degree, being a marked characteristic of r-colored vowels.

''F''₁ and ''F''₂ are not the only formants used to measure vowels. The third formant, or ''F''₃, is also often used for measuring vowel quality, but it is not typically demonstrated on a dual-axis chart as ''F''₁ and ''F''₂ are. The lowering of ''F''₃ is commonly associated with [[front rounded vowel]]s, such as {{IPAblink|œ}}, and [[r-colored vowel]]s, such as {{IPAblink|ɚ}}; the latter to a much greater degree, being a marked characteristic of r-colored vowels.

==IPA vowel diagram with added material==

==IPA vowel diagram with added material==