Interactive Sagittal Section

created by Daniel Currie Hall

Use the controls below to set the position of the lips, tongue, velum, and vocal folds. The resulting articulation will be displayed on the sagittal section on the left, and reflected in the IPA transcription on the right.

Except for lip rounding, secondary articulations are ignored in the transcription. For example, if the lips are closed, positioning the tongue for a fricative will have no effect on the transcription.

The general structure of this sagittal section is based on diagrams in The sounds of language: An introduction to phonetics, by Henry Rogers, particularly Figure 1.2.

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The old version of this page uses .gif images exclusively, and does not require Unicode.


 Bilabial fricative
 Bilabial stop
 Labiodental contact*

*Closure if nasal, fricative if oral


 Rest position (no lingual articulation)

 Oral  Nasal

Vocal folds
 Voiceless  Voiced