• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.12 no.2
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• pp.115-120
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• 2001

In this paper, we synthesized vowel /ae/ with voice synthesis program of Dr. Speech Science, and we also synthesized pathologic vowel /ae/ by some parameters such as high frequency gain (HFG), low frequency gain(LFG), pitch flutter(PF) which represents jitter value and flutter of amplitude(FA) which represents shimmer value, and grade ranked as mild, moderate and severe respectively. And then we analysed all pathologic voice by analysis program of Dr. Speech Science. We expect that this synthesized pathologic voices are useful for understanding the parameter such as noise, jitter and shimmer and feedback effect to patient with voice disorder.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.8 no.2
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• pp.166-172
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• 1997

Background : For example, aerodynamic study, vibratory study, acoustic study, neuro-muscular test and psychoacoustic evaluation, a number of objective methods are now available for assessing pathologic voice change. They help to differentiate pathologic condition from normal condition and to monitor pathologic and aging change. These laboratory analyses are used commonly to monitor speech therapy and to follow a patient's recovery after surgery. Objectives : We investigated the values of jitter, shimmer and NNE of normal person and hoarseness patients in Korea. The values of Jitter and shimmer might be meaningful parameters distinguishing pathologic vibration from normal and recovery after surgery. Materials and Methods : Statistical significance between normal control and 48 subjects taken microlaryngeal surgery were compared with Dr. speech science program that is computerized system for acoustic analysis of voice production employed to determine vocal characteristics of pitch perturbation(jitter) and amplitude perturbation(shimmer). Results : The mean normal values of jitter and shimmer were 0.226${\pm}$0.110(%), 2.200${\pm}$0.421(%) in male and 0.164${\pm}$0.060(%), 2.063 ${\pm}$0.575(%) in female. In patients with vocal nodule, the preoperative and postoperative values of jitter and shimmer were valueless. In patients with vocal polyps, the preoperative and postoperative values of jitter and shimmer were valuable. Conclusion : Dr. speech science program was effective to monitor laryngeal disease and aging changes.

• Proceedings of the KSLP Conference
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• 1996.11a
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• pp.87-87
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• 1996

객관적인 검사도구인 Dr. Speech Science(DSS)의 음성평가 결과가 갖는 의미를 알아보고자 이 연구를 하였다. 성대결절환자 여자 성인 25명을 대상으로 DSS를 이용한 음성평가와 청각심리적 검사방법인 GRBAS와의 관계를 비교 분석하였다. 청각심리적 검사인 GRBAS의 0, 1, 2, 3의 각 Grade에 따라 DSS의 음성평가의 결과와 비교하였다. DSS의 음성평가 결과로서 Grade가 0, 1, 2인 경우 총 15례중 1례를 제외한 모든 경우에 있어서 hoarseness, harshness, breathiness항목에서 정상소견을 나타냈으며 Grade가 3인 경우에는 총 10례 중 6례에서 hoarseness, harshness, breathiness항목에서 정상소견을 나머지 4례에서는 hoarseness에서 slight한 정도를 보여주었다.

• Proceedings of the KSLP Conference
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• 2001.11a
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• pp.168-168
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• 2001

• Proceedings of the KSLP Conference
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• 2003.11a
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• pp.150-150
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• 2003

연구배경 및 연구 방법 : 새로운 reed type 인공후두기 개발과 관련하여, Lx Speech Studio, Dr. Speech Science를 이용하여 53세의 정상인 남자1명과 숙련된 식도발성자 1명, 숙련된 전기인공후두자 1명, 숙련된 moksori 사용자 1명을 대상으로 음향학적 특징을 분석하였고, 3명의 음성언어치료사가 Lx Speech stuido에 저장된 이들의 음성을 듣고 청지각적으로 7점 scale로 평가하였다. (중략)

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.14 no.1
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• pp.30-39
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• 2003

Background and Objectives : Patients with pathologic voice often concern about recovery of voice after surgery. In our investigation, we give controlled values of three parameters of voice synthesis program of Dr. Speech Science. such as jitter, shimmer, and NNE(normalized noise energy) which characterize someone's voice from others and deviced a method to synthesize the predicted voice after performing operation. Subjects and Method : Values of vocal jitter, vocal shimmer, and glottal noise were measured with voices of 10 vocal cord Paralysis and 10 vocal Polyp Patients 1 week Prior to and 1 month after the surgery. With Dr. Speech science voice synthesis program we synthesized 'ae' vowel which is closely identical to preoperative and post-operative voice of the patients by controlling the values of jitter, shimmer, and glottal noise. then we analyzed the synthesized voices and compared with pre and post-operative voice. Results : 1) After inputting the preoperative and corrected values of jitter, shimmer, and glottal noise into the voice synthesis Program, voices identical to vocal Polyp Patients' Pre- and Postoperative voices withiin statistical significance were synthesized 2) After elimination of synergistic effects between three paramenter, we were able to synthesize voice identical to vocal paralysis patients' preoperative voices. 3) After inputting only slightly increased jitter, shimmer into the synthesis program, we were able to synthesize voice identical to vocal cord paralysis patients' postoperative voices. Conclusion : Voices synthesized with Dr. Speech science program were identical to patients' actual pre and postoperative voice, and clinicians will be able to give the patients more information and thus increased patients cooperability can be expected.

• Proceedings of the KSPS conference
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• 2005.04a
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• pp.81-84
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• 2005

This purpose of the present study was to determine the effects of yawn-sigh technique in voice quality of a cleft palate child. A 9-year old cleft palate child participated in the study 3 times a week for a month. The assessments were done by Dr. Speech (Version 4.0, Tiger DRS) on $F_{0}$, jitter, shimmer and NNE. The results showed that there was a tendency that the voice improved in terms of NNE. However, it did not reach a statistical significance.

• Archives of Plastic Surgery
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• v.49 no.3
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• pp.378-396
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• 2022

Several reconstructive methods have been reported to restore the continuity of the aerodigestive tract following resection of pharyngeal and hypopharyngeal cancers. However, high complication rates have been reported after voice prosthesis insertion. In this setting, the ileocolon free flap (ICFF) offers a tubularized flap for reconstruction of the hypopharynx while providing a natural phonation tube. Herein, we systematically reviewed the current evidence on the use of the ICFF for reconstruction of the aerodigestive tract. A systematic literature search was conducted across PubMed MEDLINE, Web of Science, ScienceDirect, Scopus, and Ovid MEDLINE(R). Data on the technical considerations and surgical and functional outcomes were extracted. Twenty-one studies were included. The mean age and follow-up were 54.65 years and 24.72 months, respectively. An isoperistaltic or antiperistaltic standard ICFF, patch flap, or chimeric seromuscular-ICFF can be used depending on the patients' needs. The seromuscular chimeric flap is useful to augment the closure of the distal anastomotic site. The maximum phonation time, frequency, and sound pressure level (dB) were higher with ileal segments of 7 to 15 cm. The incidence of postoperative leakage ranged from 0 to 13.3%, and the majority was occurring at the coloesophageal junction. The revision rate of the microanastomosis ranged from 0 to 16.6%. The ICFF provides a reliable and versatile alternative for reconstruction of middle-size defects of the aerodigestive tract. Its three-dimensional configuration and functional anatomy encourage early speech and deglutition without a prosthetic valve and minimal donor-site morbidity.