• 대한후두음성언어의학회지
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• 제10권2호
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• pp.119-123
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• 1999

Background and Objectives : Conditions such as muscle atrophy, stretching of strap muscles, and continued craniofacial growth factors have been cited as contributing to the changes observed in the vocal tract structure and function in elderly speakers. The purpose of the present study is to compare F$_1$ and F$_2$ frequency levels in elderly and young adult male and female speakers producing a series of vowels ranging from high-front to low-back placement. Material and Methods : The subjects were two groups of young adults(10 males, 10 females, mean age 21 years old range 19-24 years) and two groups of elderly speakers(10 males, 10 females, mean age 67 years : range 60-84 years). Each subject participated in speech pathologist to be a speaker of unimpared standard Korean. The headphone was positioned 2 cm from the speakers lips. Each speaker sustained the five vowels for 5 s. Formant frequency measures were obtained from an analysis of linear predictive coding in CSL model 4300B(Kay co). Results : Repeated measure AVOVA procedures were completed on the $F_1$ and $F_2$ data for the male and female speakers. $F_2$ formant frequency levels were proven to be significantly lower fir elderly speakers. Conclusions : We presume $F_2$ vocal cavity(from the point of tongue constriction to lip) lengthening in elderly speakers. The research designed to observe dynamic speech production more directly will be needed.

• 대한후두음성언어의학회지
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• 제19권2호
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• pp.133-135
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• 2008

Background and Objectives: The voice changes can occur in peritonsillar abscess and the labeling of this changes as a "muffled voice". The aim of this study was to investigate the changes in acoustic feature of voice before and after treatment in patients with peritonsillar abscess. Materials and Method: 12 patients with peritonsillar abscess were enrolled in the study. Acoustic analysis on sustained Korean vowels /a/, /i/ and /u/ were performed before and after treatment. Results: In patients with peritonsillar abscess, the first formant frequency (F1) and second formant frequency (F2) of /a/ were decreased. There was tendency of articulation of back-low vowel /a/ as back-high vowel /u/. F1 of /i/ and /u/ were increased, while F2 were decreased. There was tendency of articulation of front-high vowel /i/ as back-low vowel /a/. The third, forth, fifth formant frequency (F3, F4, F5) of /a/, /i/ and /u/ were decreased although statistically not significant. Conclusion: The anatomical and functional changes of oropharynx by peritonsillar abscess can cause changes in resonance and speech quality. We suggest that these changes could be the cause of 'muffled voice' in patients of peritonsillar abscess.

• 비교문화연구
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• 제20권
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• pp.5-27
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• 2010

This paper studies the relation between canonical/variegated babble (CB/VB) and early speech in an infant acquiring Mandarin Chinese from 9 to 17 months. The infant was audio-and video-taped in her home almost every week. The data analyzed here come from 1,621 utterances extracted from 23 sessions ranging from 30 minutes to one hour, from age 00:09;07 to 01:05;27. The data was digitized, and segments from 23 sessions were transcribed in narrow IPA and coded for analysis. Babble was coded from age 00:09;07 to 01:00;00, and words were coded from 01:00;00 to 01:05;27, proto-words appeared at 11 months, and some babble was still present after 01:10;00. 3821 segments were counted in CB/VB utterances, plus the segments found in 899 word tokens. The data transcription was completed and checked by the author and was rechecked by two other researchers who majored in Chinese phonetics in order to ensure the reliability, we reached an agreement of 95.65%. Mandarin Chinese is phonetically very rich in consonants, especially affricates: it has aspirated and unaspirated stops in labial, alveolar, and velar places of articulation; affricates and fricatives in alveolar, retroflex, and palatal places; /f/; labial, alveolar, and velar nasals; a lateral;[h]; and labiovelar and palatal glides. In the child's pre-speech phonetic repertoire, 7 different consonants and 10 vowels were transcribed at 00:09;07. By 00:10;16, the number of phones was more than doubled (17 consonants, 25 vowels), but the rate of increase slowed after 11 months of age. The phones from babbling remained active throughout the child's early and subsequent speech. The rank order of the occurrence of the major class types for both CB and early speech was: stops, approximants, nasals, affricates, fricatives and lateral. As expected, unaspirated stops outnumbered aspirated stops, and front stops and nasals were more frequent than back sounds in both types of utterances. The fact that affricates outnumbered fricatives in the child's late babble indicates the pre-speech influence of the ambient language. The analysis of the data also showed that: 1) the phonetic characteristics of CB/VB and early meaningful speech are extremely similar. The similarities of CB/VB and speech prove that the two are deeply related; 2) The infant has demonstrated similar preferences for certain types of sounds in the two stages; 3) The infant's babbling was patterned at segmental level, and this regularity was similarly evident in the early speech of children. The three types being coronal plus front vowel; labial plus central and dorsal plus back vowel exhibited much overlap in the phonetic forms of CB/ VB and early speech. So the child's CB/ VB at this stage already shared the basic architecture, composition and representation of early speech. The evidence of similarity between CB/VB and early speech leaves no doubt that phones present in CB/VB are indeed precursors to early speech.

• 비교문화연구
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• 제39권
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• pp.381-406
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• 2015

Russian nasal consonants / m /, / n / have a feature value not only [+consonant] in common with obstruents, but also [+sonorant] in common with vowels. Nasal / m /(bi-labial) and / n /(dental) have the same place of articulation but different manner of articulation. The feature value of / m / is [+cons, +son, +nas, +ant, -cor, -high, -low, -back, -cont, -del, rel, -strid, +voic], and that of / n / is [+cons, +son, +nas, +ant, +cor, -high, -low, -back, -cont, -del, rel, -strid, + voic]. There is a difference in feature [cor] value of / m / and / n /. In this study it is confirmed that it is a fact that the Russian nasal consonants behave differently from the other consonants in each phonological phenomenon due to their phonological characteristics. The preceding voiced obstruent is changed to an unvoiced one in a process where the last voiceless obstruent in the consonant cluster ' voiced obstruent + nasal /m/ + voiceless obstruent' skips the nasal consonant and spreads its feature value to the preceding voiced obstruent transparently because of the feature [+sonorant] of the nasal consonant. The coronal nasal /n/ participates in a palatalization with the following palatal actively and palatalize preceding plain consonants passively because of markedness hierarchy such as 'Velar > Labial > Coronal'. But the labial nasal /m/ is palatalized with the following velar palatal actively and participates in a palatalization with the following coronal palatal passively. This result helps us confirm the phonological difference of /m/ and /n/ in a palatalization. When the a final consonant is nasal, the unvoicing phenomenon of a final consonant doesn't occur. In such a case as cluster 'obstruent + nasal' the feature value [voiced] of the preceding obstruent doesn't change, but the following nasal can assimilate into the preceding obstruent. When continuing the same nasals / -nn- / in a consonant cluster, the feature value [+cont] of a weak position leads the preceding nasal / n / to be changed into [-cont] / l /. Through the analysis of the frequency of occurrences of consonants in syllabic onsets and codas that should observe the 'Sonority Sequence Principle', the sonority hierarchy of nasal consonants has been confirmed. In a diachronic perspective following nasal / m /, / n / there is a loss of the preceding labial stop and dental stop. But in clusters with the velar stop+nasal, the two-component cluster has been kept phonetically intact.

• 말소리와 음성과학
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• 제9권1호
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• pp.49-53
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• 2017

Formant frequencies depend on the position of tongue, the shape of lips, and larynx. In the auditory system, the external ear canal is an open-end resonator, which can modify the voice characteristics. This study investigates the effect of the real ear on formant frequencies. Fifteen subjects ranging from 22 to 30 years of age participated in the study. This study employed three corner vowels: the low central vowel /a/, the high front vowel /i/, and the high back vowel /u/. For this study, the voice of a well-educated undergraduate who majored in speech-language pathology, was recorded with a high performance condenser microphone placed in the upper pinna and in the ear canal. Paired t-test showed that there were significant difference in the formant frequencies of F1, F2, F3, and F4 between the free field and the real ear. For /a/, all formant frequencies decreased significantly in the real ear. For /i/, F2 increased and F3 and F4 decreased. For /u/, F1 and F2 increased, but F3 and F4 decreased. It seems that these voice modifications in the real ear contribute to interpreting voice quality and understanding speech, timbre, and individual characteristics, which are influenced by the shape of the outer ear and external ear canal in such a way that formant frequencies become centralized in the vowel space.

• 한국시조학회지:시조학논총
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• 제19권1호
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• pp.85-106
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• 2003

본질적으로 입으로 소리내어 읊조리고 청각으로 감상하기 위해 만들어지고, 일정한 형식 안에서 음성의 조화와 운율의 음악성을 중시한 소네트와 시조의 표현형식은 전반적으로 기의signifie와 관련하여 고찰되어야 한다. 보들레르의 <깨진 종>과 김종서의 <삭풍가>을 표현형식의 의미작용을 중심으로 분석해 본 결과 시적 자아의 정서는 표현형식과 밀접하게 연관되어 있다. 소네트나 시조는 의미, 율격, 각운, 음성구조, 리듬 등 여러 개별적 요소들의 집합체가 아니라 이 모든 요소들이 서로 상호 작용하는 통일된 유기체이다. 시대의 흐름에 발맞춰 낭송법에 대한 이론을 체계적으로 정립하여 시를 콘텐츠화 하여 유통방식의 변화를 꾀해야 한다. 그러기 위해서 그 자체가 표현가치를 가지는 표현형식은 낭송에 있어서 최우선 적으로 고려되어야 할 기본원리이다.

• 대한후두음성언어의학회지
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• 제16권1호
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• pp.10-14
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• 2005

Background and Objectives : Vowels are characterized on the basis of formant patterns. The first formant(F1) is determined by high-low placement of the tongue, and the second formant (F2) by front-back placement of the tongue. The fundamental frequency(F0) of a soprano often exceed the normal frequency of the first formant. And the vocal intensity is boosted when F0 is high and a harmonic coincides with a formant. This is called a formant tuning. Experienced singers thus learned how to tune their formants over a resonable range by lowering the tongue to maximize their vocal intensity. So, the current study aimed to identify the formant tuning in one experienced soprano by comparing the first formants of vowel [i] in three different voice production : speech, ascending scale, and vocalize. Materials and Method : All voices recordings of vowel [i] in speech, ascending scale (from F4 note to A4 note), and vocalize(:Ridente la calam") were made with digital audio tape-corder in a sound treated room. And the captured data were analyzed by the long term average(LTA) power spectrum using the FFT algorithm of the Computerized Speech Lab(CSL, Kay elementrics, Model, 4300B). Results : Although the first formant of vowel [i] in speech was 238Hz, those of ascending scale [i] were 377Hz, 405Hz, 453Hz respectively in F4(349z), G4(392Hz), A4(440Hz) note, and 722Hz, 820Hz, 918Hz respectively in F5 (698Hz), G5(784Hz), A5(880Hz) note. In vocalize, first formants of [i] were 380Hz, 398Hz, 453Hz respectively in F4, G4, A4 note, and 720Hz, 821Hz, 890Hz respectively in F5, G5, A5 note. Conclusion : These results showed that the first formant of ascending scale and vocalize sustained higher frequency than fundamental frequency in high pitch. This finding implicates that the formant tuning of vowel [i] in ascending scale was also noted in vocalize.

• 한국산학기술학회논문지
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• 제12권5호
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• pp.2203-2208
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• 2011

턱관절의 물리치료를 통한 훈련으로 모음 조음에 관여하는 구강 공명강을 증가시켜, 턱관절의 정상적인 발성패턴을 유지하도록 하여 턱관절장애 환자의 모음의 음향학적 특성 변화를 보고자 하였다. 연구 대상은 턱관절장애로 진단 받은 3명의 20~30대 성인 남자를 대상으로 하였다. 실험방법은 대상자간 중다기초선 설계를 이용하여 기초선 단계, 치료 단계, 유지 단계로 진행하였다. 치료는 한 회기를 30분으로 하여 주 3회 실시하였고 3회기를 한 평가단위로 5회의 중간평가를 실시하였다. 평가방법은 Praat 음성 분석프로그램을 이용하여 /ㅏ/ 모음의 연장 발성에 대한 제 1포먼트 주파수(F1), 제 2포먼트 주파수(F2) 그리고 기본주파수(F0)를 분석하였다. 물리치료를 통한 훈련 프로그램을 실시한 결과 턱관절장애 환자의 제 1포먼트 주파수(F1), 제 2포먼트 주파수(F2) 그리고 기본주파수(F0)는 치료 전 보다 증가하는 변화를 보였고, 이는 모음의 개구도와 관계된 제 1 포먼트 주파수(F1) 뿐만 아니라 모음의 전후설, 성대의 움직임과 관련이 있는 제 2포먼트 주파수(F2) 그리고 기본주파수(F0)의 변화도 함께 보임으로써 턱관절과 모음 및 음성 산출의 연관성을 보여주었다.

• 말소리와 음성과학
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• 제11권4호
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• pp.97-108
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• 2019

한국인 성인을 대상으로 최적의 포먼트 분석이 가능하도록 자동화된 프랏 스크립트를 구현하였다. 최적의 포먼트 분석이란 프랏에서 포먼트 분석 시 설정하는 2가지 세팅 파라미터(최대 포먼트, 포먼트 개수)를 조합하여 측정된 제1, 제2 포먼트의 편차합이 최소일 때를 가리킨다. 포먼트 분석의 신뢰성을 높이기 위해서는 성별이나 모음의 종류에 따라 LPC 차수를 다르게 설정해야 하는데 프랏 매뉴얼에서는 최대 포먼트 설정 값으로 남성 5,000 Hz, 여성 5,500 Hz, 측정개수는 5개를 권고한다. 그러나 이렇게 권고된 포먼트 세팅 설정이 한국어 모음에 대해서도 타당한지 검증이 필요하다. 본 연구에서 구현한 4가지 스크립트를 적용한 결과, 각 모음별 포먼트 산점도로 확인하였을 때 특히 여성의 경우 스크립트에 따라 측정된 포먼트 변이의 폭이 두드러지는 차이를 보였다. 포먼트 산점도와 통계 결과를 통해 linear_script와 qtone_script가 포먼트 측정에서 더 신뢰성이 높은 것을 알 수 있었다. Linear_script, qtone_script에서 최적의 세팅으로 설정된 최대 포먼트와 포먼트 개수의 데이터 경향성을 살펴보면, 전설 모음 [이, 에]의 경우 권고 설정보다 최대 포먼트 값은 높게, 포먼트 개수의 값은 적게 설정되었다. 반면 후설모음 [오, 우]의 경우, 권고 설정보다 최대 포먼트 값은 낮게, 포먼트 개수의 값은 많게 설정되는 것을 확인할 수 있었다.