• 한국콘텐츠학회논문지
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• 제6권12호
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• pp.186-191
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• 2006

기존의 유표성 이론에 따르면 마찰음이 파열음보다 유표적이므로 발음하기 어렵다는 것은 잘 알려진 사실이다. 따라서 본 연구에서는 한국 EFL 학습자들이 발음하기 어려운 마찰 [f, v]를 어떻게 인지하는지 살펴보기 위해서 영어 순자음 [p, b, f, v]를 판별하는 실험을 기획하였다. 40명의 한국 학생들이 영어 순자음이 들어간 임시어를 인지하는 테스트를 실행한 결과, 순자음의 운율적 위치가 인지 정확도를 결정짓는데 영향을 마침을 발견하였다. 특히 유표성 이론의 예상과 달리, 무성 마찰음 [f]의 정확도가 강세 뒤 모음사이의 위치를 제외한 모든 위치에서 높게 나왔다. 영어 순자음의 평균 인지 정확도는 강세 앞 모음사이 위치와 어두 초성에서 높은 반면에 어말 종성과 강세 뒤 모음사이 위치에서는 낮았다. 한국 학생들의 영어 순자음 인지에는 유표성 이론뿐 만 아니라 음향학적 두드러짐과 강세를 포함하는 청각적인 요소도 작용함을 보여주고 있다.

• 재활복지공학회논문지
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• 제8권3호
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• pp.227-232
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• 2014

이 연구는 언어습득 이후 난청 성인의 인공와우 이식 후 음소 지각과 음소 지각에 오류 양상 등을 알아보고자 한다. 일측 인공와우를 1년 이상 사용한 23 세부터 79($49{\pm}14$) 세 사이의 21 명(m:f=13:8)의 자음 지각 검사를 이용하였다. 자음 지각 성적은 11~86 ($60{\pm}17$)%로 관찰되었고, 인공와우 교정청력(p< .046)을 제외한 술 전 청력, 난청 기간, 인공와우 이식 연령, 술 후 사용기간 등은 유의한 관계가 나타나지 않았다. 이는 언어발달이 정상적인 경우 다른 요인들 보다는 청력의 개선을 통한 청각적 자극이 자음지각에 가장 중요하다는 것을 시사한다. 음소 정답률은 마찰음(/ㅅ, ㅆ, ㅎ/)과 파찰음(/ㅈ, ㅉ, ㅊ/)이 71~92 ($79{\pm}7$)%로 파열음(/ㅂ, ㅃ, ㅍ, ㄷ, ㄸ, ㅌ, ㄱ, ㄲ, ㅋ/)과 유음(/ㄹ/) 및 비음(/ㅁ, ㄴ/)의 33~80 ($50{\pm}13$)%보다 높게 관찰되었다. 오류 양상은 조음 방법이 같은 음소들을 서로 혼동하는 경향을 보였으며, 이는 주파수의 미세한 변화나 강도의 시간적 변화를 변별하지 못한 것으로 보인다.

• 대한후두음성언어의학회지
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• 제16권1호
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• pp.53-67
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• 2005

It is known that Korean stop consonants in syllable-initial position are of three types : lax, aspirated and forced (or unaspirated). In syllable-final position, however, these three different types are merged to a single type with the same place of articulation, although the original three-way distinction is preserved in Korean orthographic (Hangul) system. Thus the syllable-final stops are phonetically realized as voiceless "applosives" which are characterized by the absence of oral release. The aim of the present study is to investigate the laryngeal adjustments for these syllable-final stops in various phonological conditions by using fiberscope, and, is to further investigate electromyographically the laryngeal adjustments for Korean stops both in the syllable-initial and final positions in various phonological conditions. The results can be summarized as follows : 1. In the case of syllable-initial stops, the glottal widths in each three types of the Korean stops during the articulatory closure are clearly different. And the pattern of thyroarytenoid(VOC) activity appeared to characterize the three different types of Korean stops. 2. The basic laryngeal feature of the Korean syllable-final applosives is characterized by a small degree of glottal opening which begins at or slightly after the oral closure. 3. In the case, syllable-final stop followed by the copula "ita", the syllable- final stop is pronounced as the stop consonant at the initial position of the following syllable containing the vowel[i], the underlying features of three-way distinction for the stops in the Korean orthographic(Hangul) system being manifested at the laryngeal adjustment. 4. In the case of the final applosives followed by the initial stops and fricatives, the laryngeal feature of the final applosives appears to be assimilated by that of the following consonant irrespective of the difference in the place of articulation, as far as the glottal abduction/adduction is concerned. It is clearly demonstrated in the case of syllable-initial stop that thyoarytenoid(VOC) activity is suppressed for the production of the stop consonants in question, the degree of which is slightest for the forced type and most marked for the aspirated type, while it is moderate for the lax type.

• 대한후두음성언어의학회지
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• 제15권2호
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• pp.133-140
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• 2004

Background and Objectives : Vowels and resonant including nasals and liquid are produced with vocal folds vibration have been used for voice therapy of hyperadduction patients. This study was conducted to investigate phonatory characteristics of vowels and resonant consonants through the EGG measures from Lx. Speech studio (Laryngograph Ltd, UK). Materials and Method : 7 male adults produced sustained vowel /a/, /i/, /u/, nasals /m/, /n/, /${\eta}$/and liquid /I/ and read the sentences (1nasals-liquid sentence, 1 non-nasals-liquid sentence) and tongue-tip trill and humming. Fx(Hz), Ox(%) were obtained of vowels, nasals, liquid and each of the posterior vowel /a/ of /ma/, /na/, /la/, /ha/ with same F0(around F#165Hz) and amplitude (75${\pm}$5db). And also DFx(Hz), DQx(%), CFx(%) and CAx(%) were obtained from reading two kinds of sentences. Results : Qx(%) was the highest in /u/ of vowels, and nasal/n/ of the resonant consonants and nasals-liquid sentence was higher Qx than non-nasals-liquid sentence but significant differences were not found. Qx(%) of the posterior vowel /a/ of nasal consonants/n/ was higher than in the isolated vowel/a/ and other posterior vowel of resonant consonants and fricatives /h/. Regularity or periodicity and higher Qx were observed in the nasals-liquid sentence than non-nasals-liquid sentence in graphs of QxFx & CFx produced by Quantiative analysis. In the nasalance score, /u/vowel was significant higher among the vowels and /I/ liquid was significant lower among the resonant consonants and nasals-liquid sentence is higher than non-nasals -liquid sentence. CQ(%) was not significantly correlated with nasalance(%). Conclusion : These findings might signify resonant phonation was not correlated with nasalance.

• 대한후두음성언어의학회지
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• 제21권1호
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• pp.42-47
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• 2010

Backgrounds and Objects: Carcinoma of the tongue is the most common cancer of the oral cavity. A primary treatment strategy includes surgery and/or radiotherapy. Resection of the tongue often results in speech dysfunction, which depends on the site and extent of resection, type of reconstruction, and the mobility of remaining tongue. This study aimed to evaluate the characteristics of articulation errors that were resulted from the partial glossectomy without free flap reconstruction. Materials & Method : Articulation evaluations including speech intelligibility and percent of correct consonants (PCC) were performed for 24 patients who underwent partial glossectomy for their T1 or T2 tongue cancer. Mobility of the tongue, size of the resected tongue, and the history of adjuvant radiotherapy were analyzed for their relationship with the results of articulation evaluation. Results: Speech intelligibility score was $6.4{\pm}0.9$ (on 7-point scale) and overall PCC was 96.9%. There were close relationships between the size of resection and limitations in the tongue mobility, especially in "protrusion and elevation (r=-0.687)" and "retroflexion (r=-0.775)". Errors in "alveolar fricatives" and "palatal affricates" were also closely related with the size of resection (r=-0.537 and -0.538, respectively). PCC for "liquid sound" /r/ was 83.2%, which was closely related with the history of radiation therapy. Conclusion : Overall articulatory function was satisfactory in cases of early tongue cancer after partial glossectomy of a limited volume without flap reconstruction. However, the size of resection and the history of radiation therapy were closely related to the limitations in some types of tongue mobility and the resultant articulation errors.

• 음성과학
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• 제10권3호
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• pp.7-27
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• 2003

Esophageal Speech uses the esophageal air during phonation. Fluent esophageal speakers frequently intake air in oral communication, but unskilled esophageal speakers are difficult with swallowing lots of air. The purpose of this study was to investigate the difference of acoustic characteristics of vowel and consonants production according to the speech proficiency level in esophageal speech. 13 normal male speakers and 13 male esophageal speakers (5 unskilled esophageal speakers, 8 skilled esophageal speakers) with age ranging from 50 to 70 years old. The stimuli were sustained /a/ vowel and 36 meaningless two syllable words. Used vowel is /a/ and consonants were 18 : /k, n, t, m, p, s, c, $C^{h},\;k^{h},\;t^{h},\;p^{h}$, h, I, k', t', p', s', c'/. Fundermental frequency (Fx), Jitter, shimmer, HNR, MPT were measured with by electroglottography using Lx speech studio (Laryngograph Ltd, London, UK). 36 meaningless words produced by esophageal speakers were presented to 3 speech-language pathologists who phonetically transcribed their responses. Fx, Jitter, HNR parameters is significant different between skilled esophageal speakers and unskilled esophageal speakers (P<.05). Considering manner of articulation, ANOVA showed that differences in two esophageal speech groups on speech proficiency were significant; Glide had the highest number of confusion with the other phoneme class, affricates are the most intelligible in the unskilled esophageal speech group, whereas in the skilled esophageal speech group fricatives resulted highest number of confusions, nasals are the most intelligible. In the place of articulation, glottal /h/ is the highest confusion consonant in both groups. Bilabials are the most intelligible in the skilled esophageal speech, velars are the most intelligible in the unskilled esophageal speech. In the structure of syllable, 'CV+V' is more confusion in the skilled esophageal group, unskilled esophageal speech group has similar confusion in both structures. In unskilled esophageal speech, significantly different Fx, Jitter, HNR acoustic parameters of vowel and the highest confusions of Liquid, Nasals consonants could be attributed to unstable, improper contact of neoglottis as vibratory source and insufficiency in the phonatory air supply, and higher motoric demand of remaining articulation due to morphological characteristics of vocal tract after laryngectomy.

• 말소리와 음성과학
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• 제14권1호
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• pp.1-11
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• 2022

본 연구는 영어에서 어말 자음의 유무성성에 따라 선행하는 모음의 길이에 차이가 나타나는 현상이 어말 자음, (부분) 무성음화 정도, 폐쇄음의 파열 여부와 가지는 상관관계에 대해서 살펴보고자 한다. 또한, 선행 모음의 길이 차이에 대한 여러 설명 중 무성 자음 앞 모음보다 유성 자음 앞 모음을 더 길게 발화하여 어말 자음의 유무성성을 구별한다는 기능적인 관점을 중심으로 연구 결과를 보고자 한다. 본 연구는 영어 원어민 화자들을 대상으로 발화 실험을 진행하고 선행하는 모음의 길이, 어말 유성 자음의 (부분) 무성음화 정도, 어말 폐쇄음의 파열 유무를 측정하였다. 발화 실험 결과, 어말 자음의 유무성성에 따른 선행 모음 길이 차이의 비율은 어말 자음이 폐쇄음인지, 마찰음인지에 따라 달라지지 않았다. 또한, 어말 유성 자음의 (부분) 무성음화 정도가 크게 나타날수록 어말 유성 자음 앞 모음의 길이가 길게 나타나며 기능적 관점에서 예측한 바와 일치하는 결과가 나타났다. 마지막으로, 기능적 관점에 따른 예측과는 다르게 선행 모음 길이 차이의 비율은 어말 폐쇄음이 파열 없이 발화되었을 때보다 파열하여 발화되었을 때 더 크게 나타났다. 이러한 결과는 어말 자음의 유무성성에 따른 선행 모음 발화 길이의 차이를 기능적 관점으로만 설명하기에는 한계가 있다는 것을 시사한다.

• 대한음성학회:학술대회논문집
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• 대한음성학회 1996년도 10월 학술대회지
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• pp.246-246
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• 1996

Purpose: Some of the properties of the prosodic phrasing and some acoustic and phonological effects of contrastive focus on the tonal pattern of Seoul Korean is explored based on a brief experiment of analyzing the fundamental frequency(=FO) contour of the speech of the author. Data Base and Analysis Procedures: The examples were chosen to contain mostly nasal and liquid consonants, since it is difficult to track down the formants in stops and fricatives during their corresponding consonantal intervals and stops may yield an effect of unwanted increase in the FO value due to their burst into the following vowel. All examples were recorded three times and the spectrum of the most stable repetition was generated, from which the FO contour of each sentence was obtained, the peaks with a value higher than 250Hz being interpreted as a high tone (=H). The result is then discussed within the prosodic hierarchy framework of Selkirk (1986) and compared with the tonal pattern of the Northern Kyungsang dialect of Korean reported in Kenstowicz & Sohn (1996). Prosodic Phrasing: In N.K. Korean, H never appears both on the object and on the verb in a neutral sentence, which indicates the object and the verb form a single Phonological Phrase ($={\phi}$), given that there is only one pitch peak for each $={\phi}$. However, Seoul Korean shows that both the object and the verb have H of their own, indicating that they are not contained in one $={\phi}$. This violates the Optimality constraint of Wrap-XP (=Enclose a lexical head and its arguments in one $={\phi}$), while N.K. Korean obeys the constraint by grouping a VP in a single $={\phi}$. This asymmetry can be resolved through a constraint that favors the separate grouping of each lexical category and is ranked higher than Wrap-XP in Seoul Korean but vice versa in N.K. Korean; $Align-x^{lex}$ (=Align the left edge of a lexical category with that of a $={\phi}$). (1) nuna-ka manll-ll mEk-nIn-ta ('sister-NOM garlic-ACC eat-PRES-DECL') a. (LLH) (LLH) (HLL) ----Seoul Korean b. (LLH) (LLL LHL) ----N.K. Korean Focus and Phrasing: Two major effects of contrastive focus on phonological phrasing are found in Seoul Korean: (a) the peak of an Intonatioanl Phrase (=IP) falls on the focused element; and (b) focus has the effect of deleting all the following prosodic structures. A focused element always attracts the peak of IP, showing an increase of approximately 30Hz compared with the peak of a non-focused IP. When a subject is focused, no H appears either on the object or on the verb and a focused object is never followed by a verb with H. The post-focus deletion of prosodic boundaries is forced through the interaction of StressFocus (=If F is a focus and DF is its semantic domain, the highest prominence in DF will be within F) and Rightmost-IP (=The peak of an IP projects from the rightmost $={\phi}$). First Stress-F requires the peak of IP to fall on the focused element. Then to avoid violating Rightmost-IP, all the boundaries after the focused element should delete, minimizing the number of $={\phi}$'s intervening from the right edge of IP. (2) (omitted) Conclusion: In general, there seems to be no direct alignment constraints between the syntactically focused element and the edge of $={\phi}$ determined in phonology; all the alignment effects come from a single requirement that the peak of IP projects from the rightmost $={\phi}$ as proposed in Truckenbrodt (1995).