Use the Speech Sounds Visualized App to help you perfect your pronunciation of the most challenging English sounds. Vowels are the foundation of a language and often the best place to start. Test yourself by recording how you sound compared to that which is in the App. Move along to consonants and even practice all of the sounds within words and sentences. Whenever you feel challenged, zoom in to examine the x-rays or the animations of how each sound is formed to study this more closely.