Power Enhance Effect on the Hybrid Cell Based on Direct Current Nanogenerator and an Organic Photovoltaic Device

윤규철,신경식,이근영,이주혁,김상우 한국진공학회 2013 한국진공학회 학술발표회초록집 Vol.2013 No.8

벅아이 코퍼스에서의 젊은 성인 남성의 모음 포먼트 분석

윤규철,노혜욱 한국음성학회 2012 말소리와 음성과학 Vol.4 No.2

The purpose of this paper is to extract the vowel formants of the ten young male speakers from the Buckeye Corpus of Conversational Speech [1] and to analyze them in comparison to earlier works in terms of various phonetic factors that are expected to affect the realization of the formant distribution. The first two formant frequency values were automatically extracted with a Praat script along with such factors as the place of articulation, the content versus function word information, syllabic stress information, the location in a word, location in utterance, speech rate of three consecutive words, and the word frequency in the corpus. The results indicated that the formant patterns from the corpus were very different from those of earlier works although the overall pattern was similar and that the factors were strongly responsible for the realization of the two formants.The purpose of this paper is to extract the vowel formants of the ten young male speakers from the Buckeye Corpus of Conversational Speech [1] and to analyze them in comparison to earlier works in terms of various phonetic factors that are expected to affect the realization of the formant distribution. The first two formant frequency values were automatically extracted with a Praat script along with such factors as the place of articulation, the content versus function word information, the syllabic stress information, the location in a word, the location in an utterance, the speech rate of the three consecutive words, and the word frequency in the corpus. The result indicated that the formant patterns from the corpus were very different from those of earlier works although the overall pattern was similar and that the factors were strongly responsible for the realization of the two formants.

Dialect Simulation through Prosody Transfer: A preliminary study on simulating Masan dialect with Seoul speech segments

윤규철 현대영미어문학회 2006 현대영미어문학회 추계학술대회 발표논문집 Vol.2006 No.-

Synthesis and evaluation of prosodically exaggerated utterances: A preliminary study

윤규철 현대영미어문학회 2008 현대영미어문학회 춘계학술대회 발표논문집 Vol.2008 No.-

This paper introduces the technique of synthesizing and evaluating human utterances with exaggerated or atypical prosody. Prosody exaggeration can be implemented by manipulating either the fundamental frequency (F0) contour, the segmental durations, or theintensity contour of an utterance. Of these three prosodic elements, two or more can be exaggerated at the same time. The algorithms of synthesis and evaluation were suggested. Learner utterances exaggerated in each of the three prosodic features were evaluated with respect to their original native versions in terms of the differences in their F0 contours, the segmental durations and the intensity contours. The measure of differences was the Euclidean distance metric between the matching points in their F0and intensity contours. The measure was calculated after the exaggerated learner utterances were aligned by the segments and rendered identical to their native version in terms of their segmental durations. For the evaluation of the segmental durations, no prior modifications were made in durations and the same measure was used. The results from the pilot experiment suggest the viability of this measure in the evaluation of learner utterances with atypical prosody with respect to their native versions.

Imposing Native Speakers' Prosody on Non-native Speakers' Utterances:

윤규철 현대영미어문학회 2007 현대영미어문학 Vol.25 No.4

This paper introduces a technique for cloning the prosodic features of a native speaker’s utterance onto the same sentence spoken by a non-native speaker. Three acoustic aspects of prosodic features were examined: the fundamental frequency (F0) contour, segmental durations, and the intensity contour. The fundamental frequency contour and the segmental durations of the native speaker’s utterance were imposed on the non-native speaker’s utterance using the PSOLA (pitch-synchronous overlap-add) algorithm (Mouline & Charpentier, 1990) implemented in Praat (Boersma, 2005). The intensity contour cloning was also done in Praat. The technique used for cloning one or more of these prosodic features was elaborated, and its implications were discussed.

영어읽기 자동평가 모델 구축

윤규철 신영어영문학회 2011 신영어영문학회 학술발표회 자료집 Vol.2011 No.2

서울 코퍼스의 한국어 파열음 연구

윤규철 연세대학교 언어정보연구원 2020 언어사실과 관점 Vol.50 No.-

The purpose of this work was to investigate the factors affecting the three types of Korean plosives, i.e. tense, aspirated and lenis, from the spontaneous speech corpus. The factors were the VOT, the release burst, the post-burst aspiration and the following vowel onset. They were automatically extracted by a Praat script. Except for the duration factor of VOT, the other three factors were examined in terms of their spectral moments and tilts. The moments of the release burst in particular were extracted by moving a 10 ms-window every 5 ms up to seven frames, i.e. 40 ms in total, which allowed us to see the dynamic aspects of the bursts. The statistical analyses showed that the four factors are significantly different in terms of the three types of Korean plosives as well as in their place of articulation. The factors turned out to be as appropriate in the classification of the Korean plosives as the well-known factors such as the F0, H1, H2 and F2.

원어민과 한국인 학습자가 발화한 영어문장 내 이음절어에 대한 운율 평가

윤규철 영남대학교 인문과학연구소 2013 人文硏究 Vol.- No.68

The purpose of this paper is to compare, in terms of the syllable duration, pitch, and intensity, the two-syllable words embedded in the three English sentences uttered by fifty to sixty native speakers and one hundred fifty Korean female learners of English. The methodology of earlier studies was improved to better reflect the properties of the prosody. The result showed that the difference between the two groups was greatest in terms of the syllable durations. This has implications in teaching English pronunciation to Korean learners. 본 논문은 주어진 세 개의 영어 문장에 대하여 150여 명의 여성 한국인 영어 학습자들과 50~60명의 영어 원어민들이 읽은 녹음을 대상으로, 문장 안에 들어 있는 영어 이음절어들의 운율을 음절별 길이, 강도, 음도의 측면에서 측정하여 그 차이를 살펴보았다. 운율의 특성을 고려하여 기존 연구의 방법을 보완, 상대적 비율의 관점에서 살펴보았다. 그 결과 한국인 학습자들은 영어 원어민과 음절별 길이 비율에 있어서 가장 일관된 차이를 보였고, 이는 영어 강세 발음 교육에 있어서 음절별 길이 교육에 힘써야 한다는 점을 시사하고 있다.

벅아이 코퍼스를 이용한 영어 무성파열음의 VOT 연구

윤규철 한국음성학회 2012 말소리와 음성과학 Vol.4 No.2

The purpose of this paper is to investigate the voice onset time (VOT) of the English voiceless stops [p, t, k] found in the Buckeye Corpus of Conversational Speech [1]. Three young female speakers were chosen for this study and their VOT values were semi-automatically extracted along with other factors. The factors used for the analysis were place of articulation, location in word, syllabic stress, content word or not, word frequency calculated from the corpus, and the speech rate expressed in syllables per second. Results showed that, for the three places of articulation of each speaker, all the factors had a statistically significant effect on the VOT values. This paper has significance in that the materials used for the analysis were from a corpus of spontaneous natural English speech.

영어와 한국어 자연발화 음성 코퍼스에서의 무성 파열음 연구

윤규철 한국음성학회 2019 말소리와 음성과학 Vol.11 No.4

The purpose of this work was to examine the factors affecting the identities of the voiceless plosives, i.e. English [p, t, k] and Korean [ph, th, kh], from the spontaneous speech corpora. The factors were automatically extracted by a Praat script and the percent correctness of the discriminant analyses was incrementally assessed by increasing the number of factors used in predicting the identities of the plosives. The factors included the spectral moments and tilts of the plosive release bursts, the post-burst aspirations and the vowel onsets, the durations such as the closure durations and the voice onset times (VOTs), the locations within words and utterances and the identities of the following vowels. The results showed that as the number of factors increased up to five, so did the percent correctness of the analyses, resulting in 74.6% for English and 66.4% for Korean. However, the optimal number of factors for the maximum percent correctness was four, i.e. the spectral moments and tilts of the release bursts and the following vowels, the closure durations and the VOTs. This suggests that the identities of the voiceless plosives are mostly determined by their internal and vowel onset cues.