• Journal of Digital Convergence
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• v.14 no.7
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• pp.331-337
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• 2016

The purpose of this study is to provide a method to visualize the sound data to the three-dimensional image. The visualization of the sound data is performed according to the algorithm set after production of the text-based script that form the channel range of the sound data. The algorithm consists of a total of five levels, including setting sound channel range, setting picture frame for sound visualization, setting 3D image unit's property, extracting channel range of sound data and sound visualization, 3D visualization is performed with at least an operation signal input by the input device such as a mouse. With the sound files with the amount an animator can not finish in the normal way, 3D visualization method proposed in this study was highlighted that the low-cost, highly efficient way to produce creative artistic image by comparing the working time the animator with a study presented method and time for work. Future research will be the real-time visualization method of the sound data in a way that is going through a rendering process in the game engine.

• Proceedings of the KSPS conference
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• 1996.02a
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• pp.75-78
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• 1996

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.06e
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• pp.77-80
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• 1998

본 연구는, 현재 대학에서 성악을 전공하고 있는 2-3학년 재학생들과, 합창단 등에서 활동하고 있는 졸업생들이 성악적으로 '아'를 다른 피치에서 발음할 때, 그 발성의 음향학적 특징들을 보여주고 있다. 연구결과, 졸업생들의 경우 성악발성 포르만트의 형태는 피치가 높아지더라도 Speech시의 형태를 그대로 유지하고 있었다. 그러나 재학생들의 경우에는 피치가 높아지는 동안 성악발성 포르만트상에 크고 작은 변화가 있었는데, 특히 여성파트에서 f1, f2, f3의 주파수가 C5, D5의 음역에서 갑자기 낮은 주파수로 떨어지는 현상을 보였다. 이는 성악가들이 말하는 '팟사지오' 음역을 나타내는 것으로 보이며 남성보다는 여성에게서 그 숙련도의 차이가 많은 것을 보였다 [10]. 또한, 피치가 높아질수록 포르만트이외의 많은 배음열들이 재학생, 졸업생 양쪽 모두에게서 나타났는데 이는 고음부에서 울리는 특정한 발성기관의 영향으로 보인다[3].

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.475-477
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• 2022

This study aims to listen to and enjoy sounds using the voice range of the elderly based on VR as voice changes can cause difficulties in communication at ordinary times and lead to elderly people's reluctance or avoidance of social activities.

• 베이커리
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• no.7 s.444
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• pp.98-99
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• 2005

두 명의 쉐프를 뜻하는 '2-CHEF(투세프)'가 성북구 길음역 인근에 둥지를 틀었다. 지하철이 멈추는 5분 간격으로 손님이 들고 나간다는 투쉐프는 오픈한지 2주일이 조금 넘었지만 벌서부터 맛깔스러운 제품과 깔끔한 인테리어로 사람들의 입에 오르내리면서 동네 입구에 활기를 불어넣고 있다.

• Phonetics and Speech Sciences
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• v.11 no.3
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• pp.49-55
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• 2019

This study sought to investigate whether mean speaking fundamental frequency (SFF) can be predicted by parameters of voice and speech range profile (VRP and SRP) in Korean normal adults. Moreover, it explored whether gender differences exist in the absolute differences between the SFF and estimated SFF (ESFF) predicted by the VRP and SRP. A total of 85 native Korean speakers with normal voice participated in the study. Each participant was asked to perform the VRP task using the vowel /a/ and the SRP task using the first sentence of a Korean standard passage "Ga-eul". In addition, the SFF was measured with electroglottography during a passage reading task. Predictive factors of the SFF were explored and the absolute difference between the SFF and the ESFF (DSFF) was compared between gender groups. Results indicated that predictive factors were age, gender, minimum pitch and pitch range for the VRP (adjusted $R^2=.931$), and pitch range (in semi-tones) and maximum pitch for the SRP (adjusted $R^2=.963$), respectively. The SFF and ESFF predicted by the VRP and SRP showed a strong positive correlation. The DSFF of the VRP and SRP, as well as their sum did not differ by gender. In conclusion, the SFF during a passage reading task could be successfully predicted by the parameters of the VRP and SRP tasks. In further studies, clinical implications need to be explored in patients who may exhibit deviations in SFF.

• The Journal of the Acoustical Society of Korea
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• v.14 no.6
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• pp.32-39
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• 1995

This paper describes a method of musical frequency estimation using tree structured octave band filter banks and the constant Q spectral transform. The performances of the proposed method are compared with those of the conventional constant Q transform using FFT. The performances are evaluated by the estimated fundamental frequency, varying the bandwidth and the frequency resolutions. The results are as follows. With the same frequency resolution of the conventional constant Q transform using FFT, the proposed method gives the better time resolutions, thus, the limit of the processing bandwidth is removed. And, when the bandwidth and the frequency resolution are set high for more accurate results, the computational complexity of the proposed method is less than that of the conventional one.

• 재활복지
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• v.21 no.3
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• pp.165-186
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• 2017

The purpose of this study was to compare adults' with intellectual disabilities voice pitch between who have choir experiences and those who do not. Participants were a total of 21 male adults with intellectual disabilities (12 choir group members and 9 non-choir group). Praat test was conducted to compare the characteristics of pitch, produced by the participants while they were singing in their comfortable pitch range. The results showed that the range of melodic contour in the choir group was broader and higher than those of the non choir group. Participants in the choir group produced a lower pitch in the beginning note, and they produced a higher pitch compared to the non-choir group on the highest and lowest note of the song. An analysis on the pitch of the individual note that the participants produced revealed a gap between the expected pitch notes and the actual notes produced while singing. In all syllables of the song, participants in the choir group showed higher accuracy of the pitch production, and significantly more accurate on the perfect fifth and eighth intervals. Regarding to the relative pitch, participants in the choir group produced significantly more accurate notes on perfect fifth, perfect fourth, and perfect eighth intervals. Findings of the study suggest that constant singing experience enable them to have pitch training. It also implies for further studies regarding to singing abilities of adults with intellectual disabilities.

• 재활복지
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• v.22 no.1
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• pp.157-168
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• 2018

The purpose of this study is to investigate the impact of semi-closed vocal training-based Vocal Aerobic Treatment on the voice improvement of soprano. Study subject was one soprano who appealed to the suffering of her voice problem due to vocal cord nodule. A study method of conducting pre/post acoustic evaluation and subjective voice evaluation to compare the measures was used; Vocal Aerobic Treatment was carried out twice a week for a total of 32 session. In the acoustic evaluation, MDVP (multi-dimensional voice program) and VRP (voice range profile) were used to evaluate the pitch, voice quality, and voice range; in the subjective voice evaluation, SVHI (singing voice handicap index) was used to assess voice satisfaction. As a result of the pitch evaluation, the soprano maintained a proper Fo. As a result of the voice quality evaluation, the jitter, shimmer, and the noise harmonic ratio numbers decreased compared to the numbers shown before the treatment. As a result of the voice range evaluation, the scope of the range was broadened, with the number of semitone increasing from 30 to 35. As for the subjective voice evaluation, the result of the total score obtained after the survey report divided by the number of questions showed a decrease from 3.6 to 0.6. The soprano herself reported of having a minor extent of a voice problem. The summary of the above results reflects that Vocal Aerobic Treatment is useful in the voice improvement of vocalists However, as this study is case research regarding the Vocal Aerobic Treatment effect on one soprano, further research on the treatment effect covering many other vocalists is necessary. Also, there is a need for follow-up studies regarding voice management and voice treatment program on not only the vocalists but also the voice users in many other professions.

• Phonetics and Speech Sciences
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• v.13 no.4
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• pp.89-100
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• 2021

This study compared the voice range profiles (VRPs) with glissando and simplified VRP methods with 57 men who were in premutation (8-13 years), mutation (11-16 years), and postmutation (10-24 years) stages. The difference between modal and falsetto areas measured in two VRP methods was also compared. As the results, the average fundamental frequency (F0) was in the order of premuaton>mutation>postmutation. The maximum F0 (F0max), the range of F0 (F0range), the maximum intensity (Imax), and the range of intensity (Irange) were the lowest in the mutation stage, and these variables were higher in falsetto area than in modal area in both methods. In addition, most variables of VRP in glissando were higher than in simplified VRP, but the differences were not significant. This study showed that, in men in mutation stage, due to the temporary anatomical and physiological changes of the larynx, the mechanism of the vocal folds vibration changes and VRP shows a different pattern from that of other age groups. Both the VRPs of glissando and simplifed VRP are suitable for clinical practice by experienced examiners. And it is necessary to measure not only the falsetto area but also the modal area when measuring VRP.