This book reports on a spectrographic study of 12 vowel phonemes of the Ga and Dangme languages. The aim of the study is to provide a systematic description of the vowel phonemes of the two languages. The result of the study reveals that Ga and Dangme basically have the same vowel sounds, comprising of 7 orals and 5 nasalized vowels. The most interesting result is that the low vowel found in Ga and Dangme is actually a back one which could be represented by the IPA symbol / /. This book is made up of five main chapters. The first chapter, gives the aim of the study and describes the Ga and Dangme people. The second chapter discusses the trends in vowel quality research. Chapter three gives a vivid description of the methods used for data collection and analysis procedures. Chapter four gives the results of the analysis together with the results of statistical analysis. Chapter five discusses the findings of the research and then the conclusion. The book will be helpful to Linguistics students whose interest is in phonetics and phonology. Also students and researchers in acoustic phonetics and the GaDangme language will find the book very useful.