The tables show typical mispronunciations of German learners of English (top: from literature; buttom: observed in the thesis). Each error rule maps the correct pronunciation onto wrong phonemes used by learners of English. These rules are used to build acoustic models for wrongly pronounced words (mispronunciation models) to detect false pronunciations using automatic speech recognition.
The paper introduces the fricative phonemes of RP English, presenting each fortis-lenis pair individually with descriptions of the correct pronunciation. The Finnish fricative system is introduced, based on the work of Suomi, Toivanen and Yliaho (2006). The two phonological systems are then compared to each other according to the guidelines of Morris-Wilson (2004). The differences between the systems are presented along with the possible mispronunciations resulting from the divergence in the fricative charts. The second part of the paper describes a short study conducted in order to exemplify the pronunciation errors made by Finnish speakers in an actual speech. Two interviews of native Finnish people familiar with speaking English were analyzed both audibly and using the programme Praat. The purpose of this analysis was to investigate the quality of each of the fricative phonemes in the informant’s speech in order to map the possibly occurring mispronunciations. The brief study supports Morris-Wilson’s account of the Finnish pronunciation. Even the speakers most comfortable with the foreign language are still subjects to the influence of their native phonological register.
thesis Pronunciation in English - Cambridge Dictionary