Published online by Cambridge University Press: 11 November 2021
This chapter provides an introduction to the acoustic and perceptual measurement of vowels. The measurable acoustic properties of vowels are formants, duration, pitch and intensity. Perceptual measurements include identification and discrimination of natural or synthesised vowels. After a brief review of the historical representation of the vowel space, technical details are given on measuring the acoustic properties of vowels, including perceptual measurements and speaker normalisation. This last plays a pivotal role in vowel space comparison among various language and gender groups. A few normalisation methods, along with the transformation of acoustic formant frequency values into auditory scales, are reviewed to provide a foundation for a cross-linguistic and curvilinear comparison of vowels. In addition, we describe competing models and theories and discuss correlations between vowel height and pitch, followed by practical scenarios and future studies on these measurements using software and internet resources.