• Journal of Information Processing Systems
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• 제14권1호
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• pp.218-227
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• 2018

Vocal effort detection is important for both robust speech recognition and speaker recognition. In this paper, the spectral information entropy feature which contains more salient information regarding the vocal effort level is firstly proposed. Then, the model fusion method based on complementary model is presented to recognize vocal effort level. Experiments are conducted on isolated words test set, and the results show the spectral information entropy has the best performance among the three kinds of features. Meanwhile, the recognition accuracy of all vocal effort levels reaches 81.6%. Thus, potential of the proposed method is demonstrated.

• 음성과학
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• 제9권4호
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• pp.27-38
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• 2002

The purpose of this article is to present the acoustic parameters (VOT, jitter, shimmer, vF0, vAm, NHR, SPI, VTI, DVB, DSH) for consonants (/pipi/, /$p^{h}ip^{h}i$/, /p'ip'i/) and sustained vowels (/a/, /e/, /i/) produced by normal subjects and dysphonia patients at two vocal effort(normal, high) by Lombard effect using 60dB white noise. Lombard effect indicates the vocal effort increase in noisy situation. At normal vocal effort, in general the acoustic parameter values of patients are greater than normal. And in noisy situation, significant decrease of acoustic values is seen in normal compared with in dysphonia patients. The clinical implication of this finding, the vocal quality in dysphonia is not compensated by vocal effort as well as normal subjects because of the inefficiency caused by abnormal vocal fold appearance and function. And with this result, we can counsel that the voice quality can not be improved as well as the patient expect.

• 말소리와 음성과학
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• 제9권3호
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• pp.75-83
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• 2017

The purpose of this study is to find clues to the risk of voice disorders in soprano students. The subjects of the study were 17 soprano students and 18 general students (women). The phonation of vowels /a/, /i/, and /u/ with C4 and F4 notes in each group were recorded. Then, only soprano students were made to record their classical vocalization containing vibrato. Formant, formant energy, bandwidth, VAI (vowel area index), VSA (vowel space area) and L/H ratio were analyzed. There was significant difference in F3 such that the singers' note was measured around 3 kHz which seems to be 400 Hz higher than one from general students. But, There was no significant difference in L/H ratio between soprano student and the general student. There was a significant difference in F3 in the comparison of the soprano students' two vocalization methods. Classical vocalization was measured at 200Hz higher than sustained phonation in F3. Vocal tract adjustment was made and vowel space changed, but there was no significant difference in F3 energy, which is the index of singers' formant according to the phonation method. The L/H ratio, which can be a direct indicator of vocal effort, has no difference in phonation method and is lowered in all phonation methods as the pitch increases. C4 and F4 pitches are lower than the singing range of the soprano. When the pitch changes, vocal effort increases like a general student which will be an indicator of the risk of vocalization. This will be a clue to the vocalization of the immature soprano student.

• 말소리와 음성과학
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• 제13권4호
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• pp.67-74
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• 2021

본 연구는 영유아 교육시설에서 근무하는 음성의 불편감을 호소하는 10명의 여성 교사들을 대상으로 반폐쇄성도훈련(semi-occluded vocal tract exercise, SOVTE)을 원격으로 실시하였을 때 주관적으로 평가하는 음성평가에 미치는 효과를 살펴보았다. 원격 SOVTE의 효과는 한국어판 음성장애지수(Korean voice handicap index, KVHI), 음성 활동 및 참여 프로파일-한국판(Korean version of the voice activity and participation profile, K-VAPP), 음성노력도 및 GRBAS를 이용한 청지각적 평가로 평가하였다. 연구 결과, KVHI의 총 점수, 기능적 점수, 신체적 점수는 원격 SOVTE를 실시한 후에 통계적으로 유의하게 낮아졌다. 원격 SOVTE 실시 후 K-VAPP의 총 점수도 유의하게 감소하였으며, 음성노력도 또한 유의하게 감소하였다. 그러나 GRB 척도는 원격 SOVTE 실시 전과 후 간에 통계적으로 유의한 차이를 보이지 않았다. 본 연구를 통해 영유아 여성 교사에게 원격으로 실시한 SOVTE는 음성의 불편감을 감소시키는데 효과적임을 입증하였으며, 원격으로 실시한 음성치료가 효과가 있음을 보여준다.

• 대한후두음성언어의학회지
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• 제30권1호
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• pp.48-52
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• 2019

Background and Objectives : Functional aphonia is characterized by incomplete closure of the vocal folds. Semi-occluded vocal tract exercise (SOVTE) allows smoothly vocal folds collision without damage to the vocal folds tissues to produce normal vocal intensity. The purpose of this study is to report the effect of SOVTE in patients with functional aphonia. Materials and Method : Seven patients diagnosed with functional aphonia were treated with 1-3 voice therapy sessions using voiced lip-trill, humming, Lax Vox in SOVTE. To assess the effectiveness of semi-occluded vocal tract exercise, cepstral analysis and auditory perceptual assessment were performed before and after voice therapy. Results : F0 (fundamental frequency), CPP (cepstral peak prominence) and L/H ratio (low/high spectral ratio) were significantly increased, while CPP Standard deviation, L/H ratio Standard deviation were decreased. In addition, 'Grade', 'Breathiness' and 'Asthenia' were significantly decreased in the GRBAS scale after SOVTE (p<0.05). Conclusion : In our study, SOVTE seemed to be effective to elicit voice quickly and promote vocal folds vibration without muscular effort in patients with functional aphonia.

• 말소리와 음성과학
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• 제8권3호
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• pp.39-49
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• 2016

The present study examined the change of aerodynamic features after laryngomicrosurgery in patients with vocal polyps. Aerodynamic evaluation was performed in thirty-nine patients (15 males and 24 females) one week before surgery and four weeks after surgery. Evaluation protocols of vital capacity, maximum sustained phonation(MXPH), and voicing efficiency(VOFT) were used to collect 29 phonatory aerodynamic measures, requiring voice with a comfortable pitch and loudness. Statistically significant changes were found for phonation time and airflow values in the MXPH protocol, while changes were also found for airflow values, subglottal pressure values and acoustic resistance values in the VOFT protocol. Although phonation time was increased in both male and female patients, gender-dependent changes were found in airflow measurements. Men's phonation time increased with no difference in airflow rate, but women's phonation time increased with decreased airflow rate and lower subglottal pressure. The changes of aerodynamic features may be affected by women's self-perceived change for vocal attitude, which was reducing sense of vocal effort after surgery.

• 대한후두음성언어의학회지
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• 제10권1호
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• pp.43-49
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• 1999

Objectives : The purpose of this study was to systematically analyze and compare e acoustic sound structure of vocal major student's singing voice. Materials and Methods : The nineteen vocal major students were the subject group and healthy nineteen females were the control group for this study. The subject group was taken a strobovideolaryngoscopy by the use of flexible nasopharyngoscopy. And acoustic analysis was taken between two groups. Additionally the inquiry on usual voice problems and management was performed by thirty-six vocal major students. Results : The subject group presents many functional voice disorder findings such as AP contraction(44%), phase difference(36%) tremor(25%), posterior gap(17%), hyperadduction of vestibular fold(6%), and anterior gap(3%) on strobovideolaryngoscopy. And the vocal major students did reveal an enhanced number of high frequency harmonic partials when singing compared to the control group in the narrow band spectrum study. But there was no significant difference in jitter, shimmer and noise to harmonic ratio in both groups. Almost all vocal major students present a lot of voice problems in singing such as loss of high note(17%), loss of quiet voice(17%), effortful and tired voice(36%) etc on inquiry. And they always effort to prevent vocal dysfunction by the use of various type of method such as voice rest(28%), hydration(28%), gargling with salt(11%) etc. Conclusions : The vocal major students always take care of maintaining a good voice condition, but a lot of vocal major students revealed abnormal strobovideolaryngoscopic findings and they are absent in the conception of systemic and scientific voice management. Therefore, the young singers need a good voice training and voice therapy Program under the good ralationship of laryngologist and voice training teacher.

• 말소리와 음성과학
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• 제15권4호
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• pp.27-34
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• 2023

본 연구는 임상현장에서 직업에 따라 요구되는 음성문제를 이해하는데 도움이 되는 자료를 제공하기 위해 전문 음성 사용자인 직업배우와 직업적 음성사용자인 언어재활사의 주관적 음성증상을 조사하여 그 빈도를 알아보고, 두 집단 간의 주관적 음성증상에 차이가 있는지 비교하였다. 그 결과, 두 집단은 동일하게 11개의 증상 중 '노래 시 고음발성 곤란', '말할 때 목에 힘이 들어감', '음성피로감'이 고빈도 증상으로 나타났다. 두 집단의 주관적 음성증상을 비교한 결과 직업적 음성사용자 집단은 전문 음성사용자 집단에 비해 '노래 시 저음발성 곤란(p=.049)', '쉰 목소리(p=.021)', '말할 때 힘이 듦(p=.032)', '말할 때 목에 통증이 있음(p=.009)', '음성피로감(p=.018)'의 빈도가 더 빈번한 것으로 나타났다. 이러한 차이는 두 집단의 음성사용 환경이 다르고, 직업활동 시 요구되는 발성의 차이로 인한 것으로 사료된다.

• 한국엔터테인먼트산업학회논문지
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• 제15권4호
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• pp.157-166
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• 2021

본 연구는 뮤지컬 보컬 수업에 있어 다양한 발성법을 익히고 학생들에게 적용시키기 위해 동시대에 나타나는 발성법과 노래의 특징을 파악하기 위함이다. 뮤지컬 보컬 발성법은 시대의 요구에 따라 변화하며 진화하고 있다. 오늘날 현대 뮤지컬의 특징은 어느 한 장르로 국한 할 수 없으며 작품 양식과 더불어 음악의 장르도 여러 장르로 파생되어 공존한다. 본 연구의 대상인 'The Girl in 14G'는 다양한 보컬 창법을 구사하는 미국의 유명 뮤지컬 배우인 크리스틴 체노웨스(Kristin Chenoweth)의 앨범에 실린 노래이다. 이 노래의 작곡자인 제닌 테소리(Jeanine Tesori)는 이 노래에서 뉴욕을 대표하는 음악 장르인 '브로드웨이 뮤지컬, 메트로폴리탄 오페라, 이스트 빌리지 재즈'를 표현하기 위해, '성악 창법(Classical Voice), 재즈(Jazz), 벨팅(Belting) 창법, 믹스드 보이스(Mixed Voice)'의 다양한 보컬 테크닉으로 작곡하였다. 노래의 전개는 1명의 배우가 3가지 음악 스타일과 창법으로 3명의 다른 인물을 넘나들며 연기해야 하는 어려운 과정으로 구성되어 있다. 'The Girl in 14G'를 부르기 위해서는 다양한 보컬 테크닉의 습득이 필요한 만큼 많은 노력과 연습이 필요하며, 교육적 측면에서 학생과 배우에게 좋은 텍스트라 할 수 있다. 결과적으로 연구를 통해 이 노래는 탄탄한 음악적, 극적 구성을 갖는 대표적인 노래로써 현대 뮤지컬 보컬 테크닉의 융합적 특징을 잘 보여주는 예임을 확인 할 수 있었다.

• 음성과학
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• 제6권
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• pp.197-217
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• 1999

In a noisy class, the acoustic-phonetic features of the teacher and the perceptual features of learners are changed comparison with a quiet environment. Acoustical analyses were carried out on a set of French monosyllables consisting of 17 consonants and three vowel /a, e, i/, produced by 1 male speaker talking in quiet and in 50, 60 and 70 dB SPL of masking noise on headphone. The results of the acoustic analyses showed consistent differences in energy and formant center frequency amplitude of consonants and vowels, $F_1$ frequency of vowel and duration of voiceless stops suggesting the increase of vocal effort. The perceptual experiments in which 18 undergraduate female students learning French served as the subjects, were conducted in quiet and in 50, 60 dB of masking noise. The identification scores on consonants were higher in Lombard speech than in normal speech, suggesting that the speaker's vocal effort is useful to overcome the masking effect of noise. And, with increased noise level, the perceptual response to the French consonants given had a tendency to be complex and the subjective reaction score on the noise using the vocabulary representative of 'unpleasant' sensation to be higher. And, in the point of view on the L2(second language) acquisition, the influence of L1 (first language) on L2 examined in the perceptual result supports the interference theory.