• Annual Conference of KIPS
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• 2013.11a
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• pp.1474-1475
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• 2013

부항은 열 또는 음압(陰壓)장치에 의하여 부항단지 안에 음압을 조성하여 피부에 붙임으로써 피를 뽑거나 울혈(鬱血)을 일으키며 물리적 자극을 주어 병을 치료한다. 부항으로 얻어지는 물리적인 자극은 혈액순환을 촉진하고, 죽은피를 빼냄으로써 혈관을 자극하고 그로인해 다양한 효과를 얻는다. 따라서 본 논문에서는 신장에 해당하는 명문혈을 자극하여 신장과 관련된 음성분석 요소의 변화를 측정하였다. 이를 위해 신장에 이상이 없는 피실험자 10명을 선정하고 신장에 해당하는 명문혈을 자극하기 전과 후의 음성을 수집하였다. 실험은 음성분석 요소 중 신장과 관련된 1 Formant Bandwidth를 적용하여 신장 명문혈 자극 전과 후의 변화를 측정, 분석하였다. 실험 결과, 90%의 피실험자가 값이 감소하는 현상을 보였으며, 이를 통해 명문혈 자극에 따른 신장과 음성신호와의 상관성을 분석할 수 있었다.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.33 no.2
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• pp.64-76
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• 2022

Praat is a useful analysis tool for linguists, engineers, doctors, speech-language pathologits, music majors, and natural scientists. Basic parameters including duration, pitch, energy and perturbation parameters such as jitter and shimmer can be easily measured and manipulated in the sound editor. When a more in-depth analysis is needed, it is recommended to understand the advanced menus of the object window and learn how to use them. Among the object window menus, vowel formant analysis, spectrum analysis, and cepstrum analysis can be cited as useful ones in the clinical field. The spectrum object can be usefully used for voice quality measurement and diagnosis of patients with voice disorders by showing the energy distribution according to frequency axis (domain). A cepstrum object is useful for speech analysis when periodicity of the sound object is not measurable. The low to high ratio obtained from the spectral object and the CPPs measured from the cepstrum object have attracted many researchers, and it has been proven that the CPPs measured in Praat are relatively excellent.

• Phonetics and Speech Sciences
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• v.7 no.1
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• pp.21-26
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• 2015

The aim of this study is to synthesize pathological breathy voice and to make a cepstral peak prominence (CPP) table following breathiness ranks by cepstral analysis to supplement reliability of the perceptual auditory judgment task. KlattGrid synthesizer included in Praat was used. Synthesis parameters consist of two groups, i.e., constants and variables. Constant parameters are pitch, amplitude, flutter, open phase, oral formant and bandwidth. Variable parameters are breathiness (BR), aspiration amplitude (AH), and spectral tilt (TL). Five hundred sixty samples of synthetic breathy vowel /a/ for male were created. Three raters participated in ranking of the breathiness. 217 were proved to be inadequate samples from perceptual judgment and cepstral analysis. Finally, 343 samples were selected. These CPP values and other related parameters from cepstral analysis are classified under four breathiness ranks (B0~B3). The mean and standard deviation of CPP is $16.10{\pm}1.15$ dB(B0), $13.68{\pm}1.34$ dB(B1), $10.97{\pm}1.41$ dB(B2), and $3.03{\pm}4.07$ dB(B3). The value of CPP decreases toward the severe group of breathiness because there is a lot of noise and a small quantity of harmonics.

• MALSORI
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• no.64
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• pp.1-14
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• 2007

The purpose of this study was to examine the acoustic perception different by formants change for profoundly hearing impaired children with cochlear implants. The subjects were 10 children after 15 months of experience with the implant and mean of their chronological age was 8.4 years and Standard deviation was 2.9 years. The ability of auditory perception was assessed using acoustic-synthetic vowels. The acoustic-synthetic vowel was combined with F1, F2, and F3 into a vowel and produced 42 synthetic sound, using Speech GUI(Graphic User Interface) program. The data was deal with clustering analysis and on-line analytical processing for perception ability of acoustic synthetic vowel. The results showed that auditory perception scores of acoustic-synthetic vowels for cochlear implanted children were increased in F2 synthetic vowels compaire to those of F1. And it was found that they perceived the differences of vowels in terms of distance rates between F1 and F2 in specific vowel.

• MALSORI
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• no.65
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• pp.13-36
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• 2008

This paper attempts to analyze the characteristics of Korean vowel production by 12 Korean native speakers and 36 adult learners. The analyses have been performed with investigations of F1and F2 values. Results showed that there's no significant difference between /ㅔ/ and /H/ and between /ㅗ/ and /ㅜ/ in Korean native speakers' pronunciations. The distinguishing tendencies found in the analyses of foreign learners' pronunciations are fronting and lowering of /ㅗ/ by English speakers, backing and heightening of /ㅓ/ by Japanese speakers and backing and lowering of /ㅏ/ by Chinese speakers. For the limitations of this paper, it has a meaning of a preliminary study and could be developed into further research to show the order of acquisition and L1 transference.

• Journal of the Korean Institute of Telematics and Electronics
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• v.25 no.4
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• pp.430-436
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• 1988

LSF(Line Spectral Frequency) derived from LPC has known as a very useful transmission parameter of speech signals, for it has a good linear interpolation characteristics and a low spectrum distortion at low bit rates coding. This paper presents that it is possible to extract directly the formant frequencies of speech signals from LSF parameter without application of FFT algorithm by comparing the distribution of LSF parameter with the frequency distribution of analysis filter. This paper suggests the advanced algorithm that results in improving the speed of convergence at analytic solution method. Also, for the flexibility of parameters, the process that transforms from LSF to LPC is presented.

• Journal of the Korean Institute of Telematics and Electronics
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• v.10 no.3
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• pp.61-68
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• 1973

It was found that the rapidly changeable consonant's conlponents of the Korean speech can not be analyzed precisely by the method of frequency analysis, but only by the method of frequency synthesis based on the speech pattern obtained from sona-graph. The following two methods mer mainly: One was to extract the frequency region of Consortarts, and the other was to observe how the mode of the Formant of the Korean Vowel, $\mid$ㅏ$\mid$, following after some consonants. changes both by the articulation manner and by the articulation position.

• Proceedings of the KSPS conference
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• 2007.05a
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• pp.203-206
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• 2007

The purpose of this study was to investigate and quantitatively describe the acoustic characteristics of current Korean monophthongs. Recordings were made of 33 men and 27 women producing the vowels /i, e, ${\varepsilon}$, a, (표현불가), O, u, (표현불가)/ in a carrier phrase "This character is _." A listening test was conducted in which 19 participants judged each vowel. F1, F2, and F3 were measured from the vowels judged as intended vowels by more than 17 people from the listening test. Analysis of formant data shows some interesting results including the undeniable confirmation of 7-vowel system in current Korean.

• Korean Journal of Cleft Lip And Palate
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• v.8 no.1
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• pp.45-52
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• 2005

Velopharyngeal Insufficiency(VPI); the failure of velum, the lateral wall and the posterior pharyngeal wall to separate the nasal cavity from pharyngeal cavity during speech, can be caused by congenital conditions include cleft palate, submucous cleft palate and congenital palatal insufficiency. Speech problems of VPI are characterized by hypernasality, nasal air emission, increased nasal air flow and decreased intelligibility. These speech problems of VPI can be treated with the surgical procedure, the application of temporary prosthesis and speech therapy. Biofeedback technique with Nasometer is a speech treatment method of VPI that commonly used as one component of a comprehensive procedure for improvement of speech in patients with VPI. In this article describes a case of VPI treated by biofeedback technique with Nasometer; which showed satisfactory result in nasalance and formant analysis after the speech therapy during 9 months.

• Phonetics and Speech Sciences
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• v.8 no.1
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• pp.1-7
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• 2016

The purpose of this study is to know the acoustic characteristics of voice under stressful and relaxed conditions. Ten undergraduate male students participated in this study and produced 아, 에, 이 vowels in English reading, difficult Korean reading under stressful conditions, and easy Korean reading under relaxed conditions. After that, F0, jitter, shimmer, NHR, F1, F2, and F3 values were measured and analyzed. The results of this study demonstrate that speech parameters related to stress are jitter, shimmer, and NHR in that these values are lower under relaxed situations (easy Korean reading) than that of stressful situations (English and difficult Korean reading). This study will be a foundation to verify that the analysis of acoustic characteristics can serve as a quantitative tool for measuring stress levels.