• 제목/요약/키워드: manner of articulation

검색결과 47건 처리시간 0.022초

주파수 대역 제한에 의한 한국어 자음의 지각 특성 분석 (Perceptual Characteristics of Korean Consonants Distorted by the Frequency Band Limitation)

  • 김연화;최대림;이숙향;이용주
    • 말소리와 음성과학
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    • 제6권1호
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    • pp.95-101
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    • 2014
  • This paper investigated the effects of frequency band limitation on perceptual characteristics of Korean consonants. Monosyllabic speech (144 syllables of CV type, 56 syllables of VC type, 8 syllables of V type) produced by two announcers were low- and high-pass filtered with cutoff frequencies ranging from 300 to 5000 Hz. Six listeners with normal hearing performed perception test by types of filter and cutoff frequencies. We reported phoneme recognition rates and types of perception error of band-limited Korean consonants to examine how frequency distortion in the process of speech transmission affect listener's perception. The results showed that recognition rates varied with the following factors: position in a syllable, manner of articulation, place of articulation, and phonation types. Consonants in the final position were stronger to the frequency band limitation than those in the initial position. Fricatives and Affricates are stronger than stops. Fortis consonants were less stronger than their lenis or aspirated counterparts. Types of perception error also varied depending on such factors as consonant's place of articulation: In case of bilabial stops, they were perceived as alveolar stops with while in cases of alveolar and velar stops, there were changes in phonation types without any change in the place of articulation.

Vowel Fundamental Frequency in Manner Differentiation of Korean Stops and Affricates

  • Jang, Tae-Yeoub
    • 음성과학
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    • 제7권1호
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    • pp.217-232
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    • 2000
  • In this study, I investigate the role of post-consonantal fundamental frequency (F0) as a cue for automatic distinction of types of Korean stops and affricates. Rather than examining data obtained by restricting contexts to a minimum to prevent the interference of irrelevant factors, a relatively natural speaker independent speech corpus is analysed. Automatic and statistical approaches are adopted to annotate data, to minimise speaker variability, and to evaluate the results. In spite of possible loss of information during those automatic analyses, statistics obtained suggest that vowel F0 is a useful cue for distinguishing manners of articulation of Korean non-continuant obstruents having the same place of articulation, especially of lax and aspirated stops and affricates. On the basis of the statistics, automatic classification is attempted over the relevant consonants in a specific context where the micro-prosodic effects appear to be maximised. The results confirm the usefulness of this effect in application for Korean phone recognition.

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Comparison of Phone Boundary Alignment between Handlabels and Autolabels

  • Jang, Tae-Yeoub;Chung, Hyun-Song
    • 음성과학
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    • 제10권1호
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    • pp.27-39
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    • 2003
  • This study attempts to verify the reliability of automatically generated segment labels as compared to those obtained by conventional labelling by hand. First of all, an autolabeller is constructed using the standard HMM speech recognition technique. For evaluation, we compare the automatically generated labels with manually annotated labels for the same speech data. The comparison is performed by calculating the temporal difference between an autolabel boundary and its corresponding hand label boundary. When the mismatched duration between two labels falls within 10 msec, we consider the autolabel as correct. The results suggest that overall 78% of autolabels are correctly obtained. It is found that the boundary of obstruents is better aligned than that of sonorants and vowels. In case of stop sound classes, strong stops in manner-of-articulation wise and velar stops in place-of-articulation wise show better performance in boundary alignment. The result suggests that more phone-specific consideration is necessary to improve autosegmentation performance.

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조음 특성과 음소 대표 구간을 이용한 우리말 파열음의 인식 (Plosive consonants recognition using acoustic properties with the frames representing each phoneme)

  • 박찬응;이쾌희
    • 전자공학회논문지S
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    • 제34S권4호
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    • pp.33-41
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    • 1997
  • Korean unvoiced phonemes consist of nonstationary parts comparing that the vowels and nasal consonants consist of quasi-stationary part. And some phonemes, which have smae point of articulation but differnt manner of articulation, has similar characteristics, so it makes to be hard to distinguish each other. A new method usin gchanges and characteristics of acoustic properties of these phonemes to improve recognition rate are proposed. And because these changes and cahracteristics evidently occur in continuous speech except some unvoiced consonants are articulated as voiced phoneme in case to be used as an midial between voiced phonemes, this method can be applied easily. The features of the frames extracted to represent each phonemes are used asinputs to the hierarchical neural network. And with these results final decision for phoneme recognition is made thorugh post processing which the new method is applied to. Through the experimental recognition results for 9 unvoiced consonants which belong to bilabial, alveolar, and velar phoneme series, 89.4% recognition rate to distinguish in same phoneme series is obtained, and 85.6% recognition rate is obtained in case of including cistinguishing phoneme series.

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The Voiceless Stop Distinction in the Alaryngeal Speech

  • Hong, Ki-Hwan;Kim, Hyun-Ki
    • 음성과학
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    • 제7권1호
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    • pp.53-64
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    • 2000
  • Theoretically, alaryngeal speakers have difficulty in accomplishing the production of voiceless consonants. However, the perceptual studies often reveal a clear production of voiceless consonants giving good articulation scores in skilled alaryngeal speakers. The purpose of the present study was to clarify the production of voiceless stops in mode of articulation to normal speakers and skilled alaryngeal speakers. The acoustic characteristics of alaryngeal speech compared to the normal speech were investigated with special reference to the voiceless stop consonants. The surface electromyography from neck is used to monitor pharyngeal activity during speech. The general result is. that esophageal, shunt and neoglottal speakers realize the distinctions between the three types of [p] in a manner parallel to normals, whereas those using an electric voice generator do not.

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한글 자음의 주파수 분석적인 연구 (Study on the Korea Consonont by Frequency Analyzing)

  • 신용철;최진태
    • 대한전자공학회논문지
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    • 제10권3호
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    • pp.61-68
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    • 1973
  • 한글 자음을 sona-grap로 부터 얻은 음성 pattern으로 주파수분석적인 방법으로 정밀분석한다는 것은 지극히 곤란한 것이며 주파수합성적인 방법으로 연구해야 할 문제임을 알았다. 그래서 자음 주파수영역을 분석추출하였으며, 전자음에 후독하는 $\mid$$\mid$의 format가 조음방법과 조음위치와 대응해서 변화하는 상태를 주로 관찰하였다.

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검사어 및 성별.연령에 따른 음절 최대 반복 속도에 대한 연구 (A Study of Syllable Maximum Repetition Rate for Stimuli, Age and Sex)

  • 최홍식;차정민;심현섭
    • 대한후두음성언어의학회지
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    • 제12권1호
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    • pp.55-60
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    • 2001
  • Background and Objectives : Syllable Maximum Repetition Rate(MRR) is ability to repeat rapidly the articulators and is assessed for oromechanism function as one of the MPT. MRR is measured by rate(counts/sec), also simultaneously considered accuracy and consistency. The objective of the present was to examine stimuli effects and age and sex differences for MRR. Materials and Method : This study was participated 60 normal males and females(1 : 1) who were divided into two groups young(<40 years old) and old($\geq$40 years old). Stimuli were $/{P^=}a/,/{t^=}a/,/{k^=}a/,/{P^h}a/,/{t^h}a/,/{k^h}a/,/{P^=}{at^=}{ak^=}a/$ for, manner(tense and aspirated) of articulation, $/{p^h}{at^h}{ak^h}a/,/{t^h}{ap^h}{ak^h}a/$ for the effect of the order of syllable, glide /u-i/ for coordination of lip and tongue, interrupted vowel /i/ for laryngeal function. Results : There were little differences in two age groups and sex and manner of articulation for MRR tasks. The fastest average MRR of the single syllable included in this study was $/{t^=}a/$. significant differences existed between MRR for ${p^h}{at^h}{ak^h}a/ and /{t^h}{ap^h}{ak^h}a/$, which suggested that MRR was affected by the order of the syllables. MRR for interrupted vowel /i/ was about 2 counts/sec slower than average rate of 1 syllables. Conclusion : From these results, the order of the syllables was a crucial variable in MRR. rather than age or sex. There were no difference age, sex and manner of rate. The interrupted vowel repetition rate was slightly slow used and can provide basic information to assess the speech mechanism and can be useful to develop effective stimuli to differentiate the disordered group from normal.

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서울 코퍼스 20대 남성의 성대진동 개시시간 연구 (A study on the voice onset times of the Seoul Corpus males in their twenties)

  • 이유리;윤규철
    • 말소리와 음성과학
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    • 제8권4호
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    • pp.1-8
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    • 2016
  • The purpose of this work is to examine the voice onset times (VOTs) of the three types of plosives from the Seoul Corpus male speakers in their twenties. In addition, the factors known to affect VOTs were analyzed, including the place and manner of articulation, speakers, location in words, type of following vowels and speech rates calculated from the three consecutive words. Much of the findings agreed with those from earlier studies on Korean and other languages and new discoveries were made.

포먼트 통계치를 이용한 발음교정 지시 방법에 관하여 (Teaching Method of Correct Pronunciation from Formant Statistics)

  • 박일서;조철우
    • 한국음향학회:학술대회논문집
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    • 한국음향학회 2004년도 춘계학술발표대회 논문집 제23권 1호
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    • pp.69-72
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    • 2004
  • In this paper, we tried to develop a vowel training assistant method using vowel formant statistics. Formant statistics were obtained from PBW set consists of 452 words from 8 persons. Then, we calculated distance from input formants to each center of vowel formant space. Based on the distance, direct ions to correct the speaker's manner of articulation, i .e. position of jaw and tongue.

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포만트 통계치를 이용한 장애모음 발음 훈련 보조 방법에 관한 연구 (Development of Vowel Training Assistant Method Using Formant Statistics)

  • 조철우;박일서;정은태
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2003년도 신호처리소사이어티 추계학술대회 논문집
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    • pp.325-328
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    • 2003
  • In this paper, we tried to develop a vowel training assistant method using vowel formant statistics. Formant statistics were obtained from PBW set consists of 452 words from 8 persons. Then, we calculated distance from input formants to each center of vowel formant space. Based on the distance, directions to correct the speaker's manner of articulation, i.e. position of jaw and tongue.

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