• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
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• pp.746-751
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• 1991

Deafs train articulation by observing mouth of a tutor. sensing tactually the notions of the vocal organs, or using speech training aids. Present speech training aids for deafs can measure only single speech ter, or display only frequency spectra in histogrm or pseudo-color. In this study, a speech training aids that can display subject's articulation in the form of a cross section of the vocal organs and other speech parameters together in a single system Is aimed to develop and this system makes a subject to know where to correct. For our objective, first, speech production mechanism is assumed to be AR model in order to estimate articulatory notions of the vocal tract from speech signal. Next, a vocal tract profile mode using LPC analysis is made up. And using this model, articulatory notions for Korean vowels are estimated and displayed in the vocal tract profile graphics.

• 대한후두음성언어의학회지
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• 제13권2호
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• pp.188-192
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• 2002

Unilateral vocal cord palsy which is associated with laryngeal trauma is not uncommon event. In a 42-year-old male, a cricoid cartilage fracure had been developed after blunt trauma. The endoscopic findings showed contusion and diffuse swelling around the left arytenoid and false cord. During phonation, the mobility of left side true vocal cord was decreased. There were no level difference and displacement of the left side arytenoid. We used the laryngeal electromyography (LEMG) to make a differential diagnosis between the cricoarytenoid joint dislocation and the injury of recurrent laryngeal nerve. At the right thyroarytenoid muscle and cricothyroid muscle, the findings of LEMG were normal. But the amplitude and frequency during phonation were decreased (partial denervation) at the left thyroarytenoid muscle. LEMG is a very useful method to predict the diagnosis of vocal cord palsy.

• 대한후두음성언어의학회지
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• 제16권1호
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• pp.81-84
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• 2005

Vagus nerve palsy caused by herpes virus infection is rare. Here, the author presents a 65-year-old woman with acute onset of right side otalgia and sore throat, followed by delayed vocal fold paralysis on the same side. Vesicles were also found on the posterior wall of ear canal but the tympanic membrane was not involved. Laryngoscopy revealed multiple ulcerative lesions on the pharyngeal and laryngeal mucosa exclusively on the right side. One month later, she noticed dyshonia which turned out right vocal fold paralysis. Skull base to upper chest CT did not reveal local lesion. Three months after finishing the acyclovir, her symptoms were almost gone and vocal fold movement has almost completely improved. Vagus nerve involvement of herpes infection should be considered as a differential diagnosis for patients with herpes zoster oticus with sore throat.

• 대한후두음성언어의학회지
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• 제27권2호
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• pp.138-140
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• 2016

Vocal cord polyps are generally removed using a direct laryngoscope and surgical microscope. In some case of laryngeal microsurgery, laryngeal exposure with surgical microscope is difficult because of severalfactors. We experienced a case of vocal polyp with difficult laryngeal exposure in a 56 year old male patient. The vocal cord polyp was removed successfully through endoscopic approach.

• 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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• 제28권2호
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• pp.128-130
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• 2017

Sarcomatoid carcinomas are biphasic tumors which have surface epithelial changes and an underlying spindle-shaped neoplastic proliferation. A 62-year-old male with hoarseness came to our hospital for evaluation. A single smooth polypoid lesion was detected on his right true vocal fold by larnygoscope. The patient was diagnosed with vocal polyp and treated with surgical excision. Pathology report of the excised specimen was compatible with sarcomatoid carcinoma. Therefore, further surgical resection was performed to secure safety margins. We report a case of a sarcomatoid carcinoma patient who was clinically diagnosed as vocal polyp.

• 대한후두음성언어의학회지
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• 제8권2호
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• pp.239-244
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• 1997

편측 성대발적을 보였던 6례중 후두결핵이 4례, 성문부 편평세포암이 1례. 만성 후두염이 1례였으며 각 후두질환에 대한 진단과 적절한 치료를 위해서는 후두생검을 통한 보다 적극적인 조직병리학적 확진이 필요함을 문헌고찰과 함께 보고하는 바이다.

• 대한후두음성언어의학회지
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• 제28권1호
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• pp.52-54
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• 2017

Vocal polyps are benign laryngeal lesions which arise from the Reinke's space abd hoarseness is the most common symptom. However, airway compromised is rarely presented in the vocal polyp. A rare case of large subglottic polyp causing dyspnea is reported. Tracheostomy was performed under local anesthesia and then the mass was resected under general anesthesia using a laryngofissure approach. The dyspnea and hoarseness disappeared after surgery immediately. The histopathological findings indicated a diagnosis of vocal cord polyp with chronic inflammatiuon. We consider that tracheostomy is the safest and most useful procedure to guarantee the upper airway in cases of large vocal polyp showing dyspnea. We hereby report a case of huge subglottic polyp in which a tracheostomy and laryngofissure was required for removing the subglottic mass successfully.

• 대한기관식도과학회지
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• 제19권1호
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• pp.5-10
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• 2013

Bilateral vocal cord palsy (BVCP) present a challenging condition which result from various etiologies including iatrogenic recurrent laryngeal nerve injury, progressive neurological disorder, intubation, trauma, tumor and idiopathic cause. Careful history taking, laryngoscopic evaluation, laryngeal EMG, and imaging studies are helpful for providing a precise diagnosis and planning appropriate treatment. BVCP causes airway restriction and not vocal dysfunction. In patients with BVFP, treatment is directed at maximizing the airway, while attempting to limit the negative effects of treatment on vocal function. A variety of surgical procedures are available for mangement of BVCP. The most conservative, limited procedure should be selected initially, and then further surgery and more extensive surgery can be tailored to the patient's airway and voice needs. This review will address the etiology, diagnosis, and managements of BVCP.

• 말소리와 음성과학
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• 제2권2호
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• pp.27-36
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• 2010

The purpose of this study is to investigate the features of Korean infants' vocalizations according to the stages models. A total 88 infants, whose ages range from 1 to 18 months, participated in this study. This age is a critical period for vocal development. However, the study of infants' vocalizations has typically focused on children over the age of two. Because of restrictions related to the study of younger infants, from birth to the age of two, it is usually difficult to investigate what are the major features of their vocal development. Therefore, this study provides documentation and analysis of the features of infant vocalization and their vocal development stages. The results shows that the stages model of Oller & Lynch (1992) might be adapted for Korean infants' vocal development. Furthermore, the features of the infants' vocalization are not linearly appeared one stage to the next stage, but are overlapped (Koopmans-van Beinum & van der Stelt, 1986; Nathani et al., 2006; Oller, 1980; Stark, 1980; Vihman, 1996).