A Model Based on F1F2 Values for Native and Non-native Speakers Speech
In this study, vowels of native English speakers and Japanese learners of English are studied phonologically and phonetically. Native speakers of language produce and perceive sounds on the basis of its phonological system that they have acquired. As for vowels in English and Japanese phonological systems the former has eleven vowels and the latter has five vowels. This phonological difference affects foreign language learners’ perception and production. It is estimated that some of Japanese learners of English who have acquired the five-vowel system perceive eleven English vowels on the basis of their native phonological system. Even for those in advanced levels, perception of vowels in casual speech may not be an easy task.