本論文係討論臺灣東西部三個地點四個發音人的四海話，以呂嵩雁所探討的臺灣四海話的音韻擴散情形及筆者調查的語料為基礎，深入探究臺灣東西部四海話的結合類型、語音及詞彙特色。此四海話所指的是四縣客家話與海陸客家話相互接觸後，使原有的語音、詞彙及語法發生改變，而形成新的一種客家話。 本論文分為五章，第一章緒論，論述研究動機與目的、研究方法、研究範圍與限制、探討相關文獻，並介紹四縣客家話及海陸客家話的語音系統。第二章為概述臺灣東西部的史地概況，以及介紹臺灣東西部四海話的語音系統。第三章針對臺灣東西部四海話的聲母、韻母及聲調來探討其語音特色及結合類型。第四章藉由詞素結構探討臺灣東西部四海話之詞彙特色。第五章結論，總結臺灣東西部四海話的結合類型、語音及詞彙特色，並在最後提出檢討與建議之處。;The author examined the Si-Hai Hakka dialects spoken by four informants in three locations of Taiwan. Based upon studies of Sung-Yen Lu as well as the fieldwork data the author intensively explored the varieties of combination, phonological and lexical features of the Si-Hai Hakka dialects spoken in eastern and western Taiwan. In this study, Si-Hai Hakka dialects refer to the new variety due to the language contact between Sixian Hakka and Hailu Hakka. This thesis is divided into five chapters. Chapter 1 describes the research motives and purpose,research methods, scope and restrictions of the research, as well as literature review, followed by an introduction to the phonology of Sixian Hakka and Hailu Hakka. Chapter 2 contains an overview of the history and geography of eastern and western Taiwan, as well as the phonology of the Si-Hai Hakka dialects spoken in eastern and western Taiwan. Chapter 3 describes the vowels, consonants and tones of the Si-Hai Hakka dialects spoken in eastern and western Taiwan as well as phonetic features and varieties of combination. In Chapter 4, the vocabulary of Shi-Hai Hakka dialects spoken in eastern and western Taiwan were examined based on its morphological structure. Chapter 5,is the summary an overall review and recommendations.
