This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets and transcription delimiters. A vowel is a syllabic speech sound pronounced without any stricture in the vocal tract.[1] Vowels are one of the two principal classes of speech sounds, the