Definition
A vowel sound is a distinct phonetic unit produced with an open vocal tract, allowing air to flow freely. These sounds are the heart of syllables, giving words their unique identities. Different mouth positions and tongue placements create a wide range of vowel sounds. Think of vowel sounds as the colors of a painter's palette, each adding a unique hue. English has many vowel sounds, more than just the five written vowels (a, e, i, o, u). Mastering vowel sounds is crucial for clear pronunciation.