Speech Articulation Anatomy Poster 24x36inch, Speech Language Pathology - Vowels-fricative Consonants-diphthongs The Speech Articulation poster illustrates mouth anatomy and the structural movements involved in the production of each of the vowels and consonants of American English. The LP (large posters) are printed on glossy plastic in bright, easy-to-see colors. The ink side is laminated to make the The ink side is laminated to make the poster smear- proof and protect it from dirt and water. Dry-erase pens wipe off clean making the posters great for office, clinic, and classroom.