本文在自主音段音韻學 (Goldsmith 1976) 的基礎上，提出了「二空缺」的分析架構 (Lin 2006)，並以此分析台語詞彙「金仔」在兩詞素「金」與「仔」結合之後所產生的音韻變化現象 (暫不涉及音節間連音及超音段的分析)。本文提出的過渡音「二空缺」概念，也就是「重複音段」(gemination) 所認為的一個子音空缺，實際上是由二個小音段透過雙向擴散所共同參與的，即 [kim^(ma)a] 而非 [kimma] 。「二空缺」的提出除了有聲學方面的依據外，同時它也較能有效區隔 「金仔」 與 「金馬」 在語音表徵 (phonetic representation) 上的差異，即 [kim^(ma)a] '金仔' vs. [kimma] '金馬'，而非 [kimma] '金仔' vs. [kimma] '金馬'。

The purpose of this research is to investigate the phonetic representation of Taiwanese words triggered by the suffix a, using kim.a 'gold' as a case study. This paper proposes a new perspective on the autosegmental framework (Goldsmith 1976), and this new model emphasizes the role of a transition sound between the two morphemes (Lin 2006). The proposed account claims that the boundary between these morphemes is occupied by a transition sound (here called ＂two-slots＂) through bidirectional spreading as [kim^(ma)a]. The ＂two-slots＂ hypothesis is based on the acoustic evidence; most importantly, it solves the phonetic distinction between the two words [kim^(ma)a] 'gold' and [kimma] 'place names'.