Notice: This Contains English Only Content. Spanish and German not included.

This application was originally designed at the University of Iowa to help students learning how the sounds of different languages are produced. Since its production, it has become a milestone for phonetics teaching tools around the globe.


Sounds of Speech™ provides a comprehensive understanding of how, physiologically, each of the speech sounds of American English is formed. It includes animations, videos, and audio samples that describe the essential features of each of the consonants and vowels of American English. Sounds of Speech™ is especially useful for students studying English as a second language. Features include: