| Abstract | 第7页 |
| 摘要 | 第8-13页 |
| Chapter One Introduction | 第13-19页 |
| 1.1 Background of the Study | 第13-16页 |
| 1.2 Objectives and Significance of the Study | 第16-17页 |
| 1.3 Organization of the Thesis | 第17-19页 |
| Chapter Two Literature Review | 第19-32页 |
| 2.1 Acoustic Studies of Vowels | 第19-27页 |
| 2.1.1 Synchronic Studies | 第21-24页 |
| 2.1.2 Diachronic Studies | 第24-27页 |
| 2.2 Diachronic Acoustic Studies of Harrington Based on the Queen's Christmas1 Broadcasts | 第27-29页 |
| 2.3 Acoustic Study of RP's Monophthongal Vowel Changes | 第29-32页 |
| Chapter Three Methodology | 第32-37页 |
| 3.1 Research Questions | 第32-33页 |
| 3.2 Research Design | 第33-37页 |
| 3.2.1 Materials | 第33-34页 |
| 3.2.2 Data Collection | 第34-37页 |
| Chapter Four Results and Findings | 第37-59页 |
| 4.1 Pattern of Monophthongal Vowel Changes in Space | 第37-44页 |
| 4.1.1 Space Changes from 1950s to 1980s | 第41-42页 |
| 4.1.2 Space Changes from 1980s to 2000s | 第42-43页 |
| 4.1.3 Space Changes from 1950s to 2000s | 第43-44页 |
| 4.2 Pattern of Monophthongal Vowel Changes in Height | 第44-49页 |
| 4.2.1 Height Changes from 1950s to 1980s | 第46-47页 |
| 4.2.2 Height Changes from 1980s to 2000s | 第47-48页 |
| 4.2.3 Height Changes from 1950s to 2000s | 第48-49页 |
| 4.3 Pattern of Monophthongal Vowel Changes in Retraction | 第49-54页 |
| 4.3.1 Retraction Changes from 1950s to 1980s | 第50-51页 |
| 4.3.2 Retraction Changes from 1980s to 2000s | 第51-52页 |
| 4.3.3 Retraction Changes from 1950s to 2000s | 第52-54页 |
| 4.4 Shift Direction of the Queen's Monophthongal Vowels | 第54-59页 |
| Chapter Five Discussion | 第59-64页 |
| 5.1 Changes in Vowel Space | 第59页 |
| 5.2 Changes in Tongue Height and Tongue Retraction | 第59-61页 |
| 5.3 Shift Direction of the Queen's Vowels | 第61页 |
| 5.4 Reasons for These changes | 第61-64页 |
| Chapter Six Conclusion | 第64-66页 |
| References | 第66-76页 |
| Appendices | 第76-80页 |
| Acknowledgements | 第80-81页 |
| Publications | 第81-82页 |
| 学位论文评阅及答辩情况表 | 第82页 |
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