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Audiol > Volume 8(1); 2012 > Article
Audiology 2012;8(1): 41-51.
Published online: June 30, 2012.
doi: http://doi.org/10.21848/audiol.2012.8.1.41
차원 축소 알고리즘을 이용한 한국어 자음간 거리 매핑 연구
장선아1, 오승하2, 최승진3, 김민제4, 박선호5
2서울대학교의과대학 이비인후과학교실, 서울대학교의과대학 감각기관연구소
3포항공대 컴퓨터공학과, 정보전자융합공학부, 창의IT융합공학과
4일리노이대학 컴퓨터공학과
5포항공대 컴퓨터공학과
A Study of mapping distance among Korean consonants using dimension reduction algorithm
Son-A Chang1, Seung-Ha Oh2, Seung-Jin Choi3, Min-Jae Kim4, Sun-Ho Park5
1School of Speech Therapy and Aural Rehabilitation, Woosong University, Daejeon, Korea
2Department of Otorhinolaryngology, Seoul National University College of Medicine, Sensory Organ Research Institute, Seoul National University Medical Research Center, Seoul, Korea
3Department of Computer Science and Engineering, Division of IT Convergence Engineering (WCU Program), Department of Creative Excellence Engineering (by courtesy), Pohang University of Science and Technology, Pohang, Korea
4Department of Computer Science, University of Illinois at Urbana-Champaign, IL, USA
5Department of Computer Science and Engineering, Pohang University of Science and Technology, Pohang, Korea
Correspondence  Seung-Ha Oh ,Tel: (02) 2072-2442, Fax: (02) 2072-2537, Email: shaoh@snu.ac.kr
Received: May 20, 2012; Revised: June 14, 2012   Accepted: June 15, 2012.  Published online: June 30, 2012.
There have been increasing needs to understand speech signals to reveal auditory processing mechanism. We investigated an optimal dimension reduction algorithm and features for reflecting distance between Korean consonants. First, we reduced features of consonant articulatory phonetics from 15 to 5-6 using three dimension reduction algorithms. This revealed 90% of the distance distribution of Korean consonants. Next, we applied the Isomap method to show the most similar acoustic features of speech banana. Results showed a useful mapping of consonant articulatory distances. For example, we found that consonant /ㅂ(p)/ and /ㄷ(t)/ share 13 out of 15 features of articulatory phonetics, with only the features of bilabial and coronal being different, suggesting that they are the most difficult to discriminate from each other and reflected in the shortest distance between these two consonants in the Isomap method. However, the Isomap method was not effective in distinguishing the acoustic features of fortis from aspirated with limited numbers of acoustic features which are using for English consonants. This study shows that the use of reduction algorithms and the Isomap method can be effective in consonant mapping of articulatory features. These findings suggest that they are useful tools in phonetics research when combined with acoustic phonetics data and real voice data.
Key Words: Sound processing, Dimension reduction algorithm, Speech features, Articulatory phonetics, Acoustic phonetics, Consonant distribution
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