• Annals of Clinical Neurophysiology
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• 제12권2호
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• pp.70-72
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• 2010

We report a 53-year-old male having Kennedy disease who complained of severe bilateral tinnitus and autophony. He was diagnosed as patulous Eustachian tube based on the observation of fluttering motion of the tympanic membrane associated with respiration, which is presumed to occur secondary to bulbar weakness. The patulous Eustachian tube affected the management of his respiratory problem by impairing his ability to tolerate BiPAP. We report this rare condition with a literature review.

• 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.

• 음성과학
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• 제7권4호
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• pp.83-90
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• 2000

The purpose of this study was to examine some acoustic characteristics in the ear canal. It was assumed that a sound outside the external auditory canal could be different from the sound inside the external auditory canal. The acoustic signals were captured by a probe microphone placed at a distance within 1 cm from the tympanic membrane, and a reference microphone was placed over the upper pinna. Three vowels /a/, /i/, /u/ were recorded from a normal adult male speaker. The parameters such as the formant frequency ($Fl\simF5$) and the peak intensity were measured using a speech analyser, PCquirer. It was found that the entering part of the external auditory canal functions as a narrowing point as to the speech that passes through the free field. Results show that acoustic characteristics were changed for speech discrimination rather than speech perception.

• 한국잠사곤충학회지
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• 제52권2호
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• pp.89-95
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• 2014

Silk polymer has been focused recently on medical applications as a novel biomaterials. The factors for biomaterials were considered and reviewed recent research on surgical suture, wound dressing, tympanic regeneration patch, guided bone regeneration membrane, bone implant and ligament. Silk polymer is good mechanical properties and biocompatibility. Therefore it might be used as one of promising materials for medical application.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.883-888
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• 2004

One of commercial rapid transits produces peculiar booming sound when passing through the slab-track tunnel. In order to analyze that tympanic membrane-pressing noise systematically, typical source-transfer path-response analysis was carried out. Considering the octave band of booming noise, work scope was confined to structure-borne noise analysis, especially the dynamic behaviour of railway tracks. Experimental modal analysis of railway tracks, composed of rail, rubber pad, sleeper, ballast, and ground were performed. The results shows that transversal bending modes of the rail are suspicious for the cause of the low band booming noise. Finite element analysis are made use of to match preceding experimental results, and plausible dynamic properties of track components are produced.

• Korean Journal of Otorhinolaryngology-Head and Neck Surgery
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• 제60권3호
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• pp.140-143
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• 2017

Hemangiomas are relatively common in the head and neck region, but their occurrence in the temporal bone are extremely rare. The hemangioma of the external auditory canal (EAC) is a rare otologic entity as only 22 cases of hemangioma of the EAC have been reported worldwide. Here we report a patient presenting with pulsatile tinnitus, which turned out to be caused by capillary hemangioma arising from the posterior medial portion of external auditory canal touching the tympanic membrane. Surgical excision of the tumor was successful. The clinical manifestations and management of benign vascular lesions of the EAC are discussed with a review of literature.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1981년도 제15차 학술대회연제순서 및 초록
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• pp.39.3-40
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• 1981

후천적진주종의 형성에 있어서 고막의 Shrapnell부분과 외이도후상부 상피의 상고 실내 침입 및 고막 중심성천공의 margin으로부터 상피가 침입하는 이른바 immigration설과 이밖에 metaplasia설이 있다. 임상적으로 진주종이 상고실에 형성된다는 사실은 알려져 왔으나 그 발생기전에 대한 해명은 충분하지 않는 실정이다. 연자 등은 최근에 중이수술을 시행한 진주종 170례에 대하여 검토를 가하였다. 수술소견에 있어서 진주종의 primary focus가 상고실에 있을 때 Shrapnell부위의 marginal 및 central perforation 2가지 형의 천공이 관찰되었으며 Prussak's space안으로 retraction 및 Rivinus notch의 골벽결손 등을 볼 수 있었고 진주종이 있었던 36례중 Shrapnell부위의 중심성천공을 동반한 경우 5례, Rivinus notch의 골벽이 결손된 경우와 Shrapnell부위의 후상부 marginal perforation이 있고 진주종을 형성한 경우 21례, 그중 Shrapnell부위의 중심성천공을 동반한 경우 3례였다. 결론적으로 상고실 진주종이 잘 생기는 이유는 1) 상고실은 염증성분필물을 배설하는 구씨관입구와의 거리가 있고 2) 고막 Shrapnell부위의 고유층은 collagen fiber가 긴장부에 비해서 엷고 탄력성섬유가 많기 때문에 표피층의 각화증식을 일으킬 경우 Prussak's space내로 retraction을 일으키기 쉽다. 3) Shrapnell부위의 상부에 위치한 Rivinus notch에 부착한 epidermis는 각화증식에 의하여 Rivinus notch margin과 여기에 부착하고 있는 고막연의 margin사이를 파괴하여 상고실로 상피가 침입하게 된다.

• 한국임상수의학회지
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• 제21권2호
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• pp.149-153
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• 2004

This study was to determine the procedure for ultrasonographic imaging of the canine external ear canal(ECC). By infusion of warm saline solution into the ear canal, a real-time B mode ultrasonographic examination of the ECC was performed in five healthy Beagle dogs and two dogs with severe otitis externa. The ultrasonography was very useful to detect the structures of the ECC and the tympanic membrane. An 11 NHz linear probe was permitted to assess an anechoic lumen of the ECC and a hyperechoic cartilage surrounding the ear canal. In two dogs with otitis externa, it could be assessed the ECC with ultrasonography without ear cleansing. A lumen of the ECC was irregular and a cerumen could be seen, but edematous inflammatory changes of the ECC could not be identified. The results suggest that ultrasonography of the ECC with an 11 NHz linear probe after infusing the saline solution into the ear canal may be an accurate, non-invasive, rapid, and widely available method for assessment of the ear canal diseases such as otitis externa, polyp, stenosis, hyperplasia, and foreign body in dogs.

• 한국소음진동공학회논문집
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• 제23권3호
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• pp.226-233
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• 2013

Individual differences in head-related transfer functions(HRTFs) were calculated using boundary element(BE) models for three Korean adults. The BE models for the individuals were developed from the computerized tomography(CT) images of the individuals. The BE models were composed of the head, pinna, and ear canal. The frequency-dependent impedance boundary conditions were imposed on the skin, hair, and tympanic membrane. The HRTFs calculated from the individual BE models showed large difference above 2 kHz in magnitude and in the locations of peaks and valleys of the frequency spectrums, which should be considered in virtual auditory sound field. The identified individual differences in the HRTFs demonstrate that the developed BE models can be utilized successfully in order to obtain the HRTFs information of individuals.

• 대한의용생체공학회:의공학회지
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• 제16권4호
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• pp.471-480
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• 1995

기니픽 고막에의 격음 노출 전후에 N1-N2 오디오그램의 변화를 검사하였다. 격음 노출은 106 dB SPL의 세기와 10KHz의 주파수를 가진 연속 격음을 10분 동안 노출시키는 방법이였다. 격음 노출 전후의 N1-N2 오디오그램들을 비교한 결과, 격음 노출된 달팽이관이 그의 기능을 영구적으로 상실하고 있음을 보여줬다. 가장 두드러진 한계치의 이동이 12-13.2KHz 사이에서 발생하였다. 격음 노출후의 달팽이관 기능의 변화는 격음 손상 이전의 달팽이관 상태에 따라 달라졌다. 좀 더 예민한 달팽이관이 덜 예민한 달팽이관 보다 격음 손상이후 그 기능면에서 더욱 심각하게 손상되었다.