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:

What's New

Version 2.2.2

New improved interface now includes iPad
Dictionary search
Text translations for: Spanish, Korean, Chinese (Simplified and Traditional) (English version only)

Ratings and Reviews

2.5 out of 5

11 Ratings

11 Ratings

Grrr I should have read closer


I was on the website where they have English Spanish and German, so thought the app would have German. Nope, it doesn’t. Yes, it says that in the description. My bad. But still really annoying. I hoped that I could count on it being updated with German someday, but apparently the latest update was 2 years ago, so figuring it won’t. Dang it.
Update to add the animations of the voiceless stops and fricatives have voicing - “tuh” instead of “t” etc. This is terrible!! At least the videos are correct.

Wish pause and slow motion were options

Annie Santoro

Love the idea of the app, I just wish I could pause the animations or view them in slow motion. My apraxia and dysarthria patients often require extra processing time, slowing it down would help their concept transfer!

Awesome work


It would be way better if add the fluctuation of recording to compare the difference.


University of Iowa Research Foundation
80.1 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2014


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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