Soon-Bok Kwon

Real-time dual visualization of two different modalities for the evaluation of vocal fold vibration - Laryngeal videoendoscopy and 2D scanning videokymography: Preliminary report.

OBJECTIVE Currently, various tools have been introduced for the assessment of vocal fold vibration: laryngeal videolaryngoscopy (LV), videokymography (VKG), high speed videoendoscopy (HSV), digital videokymography (DKG), and 2D scanning videokymography (2D VKG). Among these, the authors have recently designed a dual modality examination system using LV and 2D VKG for more detailed information regarding the vibrations of the vocal folds. The clinical availability of this hybrid system offers medical imaging departments a range of potential advantages in the evaluation of vocal fold vibration. The obvious benefit of simultaneous acquisition is the improved integration of information that allows not only optimal anatomic localization, but also physical movement patterns. Other advantages include the lessened inconvenience to patients due to no longer requiring repeated examinations and shortening the examination time, and increased profitability. The purpose of study was to identify the efficacy of real-time dual examination of two different modalities for the evaluation of vocal fold vibration in human subjects and vocal fold vibration simulator. METHODS One vocally healthy subject and three patients with vocal fold nodules, a vocal cyst, and vocal fold paralysis took part in this study. The vibratory patterns of the vocal folds were visualized using simultaneous real-time examination of two different modalities. Additionally, qualitative and quantitative analyses of the dual LV and 2D VKG images were performed. RESULTS Real-time dual examination using a two modality system provided high definition images of the vibratory movements of the vocal folds. By assessing the obtained images, we confirmed that the dual modality examination method was useful in the evaluation of pathologic vibratory patterns, even in non-periodic phonation. CONCLUSION The present system might improve the understanding of the processes of vocal fold vibration and make a contribution to pathologic voice research, as well as clinical practice.

Development of Automatic Calibration System for PC-Based Pure Tone Audiometer

A pure tone audiometer should be able to produce both pure tone and masking noise with exact sound pressure level and frequency. For such purpose, it is unavoidable to periodically calibrates pure tone audiometer. However, manual acoustic calibration requires not only attention but also long time. It is possible to execute automatically calibration using software if it is PC-based pure tone audiometer. In this paper, we describe auto-calibration software for PC-based pure tone audiometer and dedicated sound level meter which has been implemented upon PC by us. To verify auto-calibration module, we examine whether output of PC-based audiometer calibrated through auto-calibration of this paper satisfies RETSPL of IEC or not.

A Study of Cepstral Peak Prominence Characteristics in ADSV, SpeechTool and Praat

목적: 본 연구의 목적은 켑스트럼 분석을 위해 제공된 세 가지 소프트웨어, ADSV, SpeechTool, Praat을 이용하여 획득된 CPP 측정값을 비교하고 상관관계를 알아보기 위한 것이다. 방법: 본 연구에서는 성문암 환자 65명이 모음 연장발성, 문단 읽기 과업을 수행한 음성샘플에 대하여 켑스트럼 분석, 청지각적 평가를 실시하여 데이터를 수집하였다....

An Analysis of Speech Performance Characteristics of Normal Korean Speakers Using a Motor Speech Profile: A Survey in Busan and Gyeongnam

배경 및 목적: 말수행력에 대한 객관적인 분석과 비교는 정상수준보다 저하된 구강운동기능을 평가하고 이해하는데 중요하다. 현재 객관적인 말수행력 분석 프로그램으로 널리 사용되고 있는 것은 KayPENTAX의 CSL 하위 프로그램인 Motor Speech Profile이다. 프로그램 내에서 제시된 역치값과 기준값은 외국인 화자들을 대상으로 한 결과이기 때문에...

Effects of Treatment and Self Voice Therapy Modeling for Patient with Vocal Nodules

The experimental group carried out a self voice therapy modelling program while the control group did only vocal hygiene. The acoustic measurement and voice manipulation for providing the patients visual, auditory feedback were done by a speech analysis software, Praat. The authors designed vocal hygiene, abdominal respiration and Praat self voice feedback therapies and applied them to 15 patients while applying only one vocal hygiene to 15 of the control group. For the purpose of examining the degree of their voice improvement after the treatment, pre- mid- and final evaluations were made for the two groups at the beginning, the 6th week and immediately after the 8th treatment session. Results of this study were as follows: The treatment group showed much improvement after receiving the voice treatment. In particular, acoustical and physiological indices from the optical endoscopy, pitch variation (jitter), amplitude variation (Shimmer), maximum phonation time (MPT), and psychoacoustic evaluation showed statistically significant improvements over the control groups.In order to share formal semantic among aviation information systems, this paper proposes a method for constructing common semantic platform(SP4IAIS), on which the interfaces of aviation information systems and message be transmitted between them can be interpreted under unified ontology. Firstly, by comparing structure of concept definition with normal form deriving from different ontologies, plenty of term pairs satisfying inclusion relation can be extracted from Descartes set of terms set of distributed ontologies. Then according to those terms pair, a concept lattice is built to represent the fused ontology as the shareable semantic platform. Compared with existing methods, SP4IAIS is a platform with full formal semantic, so can facilitate to composition and communication of aviation information systems automatically. Furthermore, the integrated semantic environment builds a foundation for mining relations among these distributed aviation information systems so as to analyses the reasons of flights delay and optimize the airline management.

Classification of Age Group in Auditory Perception For Pitch Modulated Female Speech Sound

목적: 말소리의 음도는 화자의 성별 및 연령에 대한 청자의 인식에 중요한 역할을 하며, 성장기에는 음도의 변화가 크다. 그러나 성장기의 여성 음성에 대한 청지각적 평가와 관련된 연구는 많지 않다. 따라서 본 연구는 음도를 변조한 여성의 말소리에 대한 청지각적 평가를 통해 아동, 청소년(여성), 성인 여성으로 지각되는 음도 수준을 알아보고자 한다. 방법:...

The Efficacy of Augmented Reality Based Speech Language Therapy Program on Verbal Expression Vocabulary Improvement in Children With Intellectual Disabilities

Purpose: For effective verbal expression training, it is required to develop and utilize a therapeutic medium that is capable of expressing dynamic...

Usefulness of Two-Dimensional Digital Kymography in Patients With Vocal Fold Scarring

OBJECTIVE Although laryngeal videostroboscopy is widely utilized in the analysis of vocal fold vibrations, it is often difficult to identify patterns of vocal fold vibrations in patients with aperiodic voice signals due to failure of synchronization during laryngeal videostroboscopy examination. Therefore, the present study aimed to compare the usefulness of simultaneous two-dimensional digital kymography (2D DKG) and traditional DKG for the detection of changes in the pattern of vocal fold vibrations in patients with vocal fold scarring (VFS). METHODS Seven patients with VFS and one normal subject underwent high-speed videoendoscopy (HSV). DKG and 2D DKG evaluations of vocal fold vibrations were performed simultaneously, following which both qualitative and quantitative analyses were performed. RESULTS Simultaneous DKG and 2D DKG enabled observation of vibratory patterns as well as amplitude and phase symmetry. DKG revealed and provided temporal information regarding the pattern of vocal fold vibrations at sites of VFS. In contrast, 2D DKG provided real-time information regarding the pattern of vibrations for the whole vocal fold region and regions of increased stiffness, as well as spatial information regarding changes in this pattern. CONCLUSION Our findings indicate that 2D DKG enables the assessment of overall vocal fold vibrations, regardless of periodicity, and that simultaneous DKG and 2D DKG can be used to confirm abnormal patterns of vocal fold vibrations in patients with impaired flexibility and elasticity of the vocal folds.

The Development and Application Effect of Web Speech Recognition-Based Intensive Training Program for Improving Naming Ability in Wernicke's Aphasic Patient

Purpose: In order to connect auditory words and mental representation in patients with Wernickes aphasia, we developed an online speech recognition based intensive training program (WSRITP) and investigated the programs effectiveness. Methods: Our study adapted the stimulation-facilitation model a...

The Effect on Intervention Program and Auditory-Perceptual Discrimination Feature of Postlingual Cochlear Implant Adults about Pathological Voice

In the present study, we investigated ability of recognition of auditory perception with regards to the quality of voice in postlingual CI adults and proposed a training program to improve within subject reliability. A prospective case-control study was conducted in adults with 7 postlingual deaf who received a CI surgery and 10 normal hearing controls. The pre and post test and training program included parameters of consensus auditory-perceptual evaluation of voice(CAPE-V) with pathological voice sample by using Alvin. In results of pre-post test for monitoring improvements of internal reliability for listeners via the training program, there was statistically significant difference in both test and group. There was statistically significant difference in internal reliability between pre-post test in the normal hearing group, the result was no significant in the CI group. The present study found that CI adults showed less ability in awareness of voice quality compared to normal hearing group. Also the training program improved pitch and loudness in CI adults.