• 음성과학
• /
• 제12권2호
• /
• pp.73-80
• /
• 2005

This study was analyzed to change of /i/ formant follow cochlear implantation periods for hearing impaired children with cochlear implantation. 20 hearing impaired children participated and acoustic analysis of /i/ was used CSL(Computerized Speech Lab; Model 4300b) annually. The data was captured the first formant, $2^{nd}$ & 3th formant frequency of /i/ and was analyzed using ANOVA. Multiple range test to investigate difference between group was treat with LSD and Duncan. The results of /i/ formant analysis for hearing impaired children with cochlear implantation, each formant at a year keeping with cochlear implantation was located at high frequency. In accordance with CI periods, the each formant decreased significantly, especially between a year and $2^{nd}$ year taking with cochlear implantation.

• 대한음성학회지:말소리
• /
• 제47호
• /
• pp.141-151
• /
• 2003

The speech intelligibility of congenitally deafened children shows the change after cochlear implantation. The predicting factors of change in speech intelligibility are the age of implantation, the duration of implant use, and communication mode etc.. Among these factors, the age of implantation seems to be one of the most important predictors. But those factors including age of implantation can explain only some parts of the variance. Therefore, the further study to find the factors which affect the speech intelligibility should be done.

• Journal of Audiology & Otology
• /
• 제23권3호
• /
• pp.135-139
• /
• 2019

Background and Objectives: This study was undertaken to investigate the educational status in bilateral prelingual deaf children with a cochlear implant (CI), also known as early cochlear implantees (CIs). Type of schooling and enrollment rate of tertiary education were analyzed as primary results. Subjects and Methods: Participants in this study comprised a highly homogeneous group of deaf patients who underwent cochlear implantation at a similar age. Sixty-four Korean patients were enrolled. Statistical data for disabled populations and the general population were obtained from the National Statistics Korea. Results: Among 64 patients, 46, 8, and 10 attended mainstream, integrated, and special schools, respectively. Notably, there was a significant difference in the type of school between hearing-impaired and CI groups (p=0.007). Ten of 13 patients enrolled in tertiary education. Conclusions: CI users were more likely than hearing impaired students to attend mainstream school. The enrollment rate of CI users in tertiary education was the same as that of the general population.

• 대한청각학회지
• /
• 제23권3호
• /
• pp.135-139
• /
• 2019

Background and Objectives: This study was undertaken to investigate the educational status in bilateral prelingual deaf children with a cochlear implant (CI), also known as early cochlear implantees (CIs). Type of schooling and enrollment rate of tertiary education were analyzed as primary results. Subjects and Methods: Participants in this study comprised a highly homogeneous group of deaf patients who underwent cochlear implantation at a similar age. Sixty-four Korean patients were enrolled. Statistical data for disabled populations and the general population were obtained from the National Statistics Korea. Results: Among 64 patients, 46, 8, and 10 attended mainstream, integrated, and special schools, respectively. Notably, there was a significant difference in the type of school between hearing-impaired and CI groups (p=0.007). Ten of 13 patients enrolled in tertiary education. Conclusions: CI users were more likely than hearing impaired students to attend mainstream school. The enrollment rate of CI users in tertiary education was the same as that of the general population.

• 음성과학
• /
• 제13권2호
• /
• pp.47-58
• /
• 2006

People tend to control their speech rate to help those with listening problems such as hearing impaired people. The aim of this study was to investigate effects of speech rate on the sentence perception by 10 adults with cochlear implantation. The sample speech included 42 sentences at normal, slow, and very slow speed focusing on the overall duration, vowel or pause duration. The subjects listened to the speech and wrote down what they heard. Each correct syllable of the content words in the sentence was counted to obtain the score. Partial points were given to the incomplete syllables. Results of this study were as follows: 1. The changes of speech rate had some influence on the sentence perception score by the cochlear implanted people. 2. In slow pause condition, the controlled speech rate had a positive effect on the perception score.

• 재활복지공학회논문지
• /
• 제8권4호
• /
• pp.245-250
• /
• 2014

이 연구의 목적은 음절 간 쉼 간격이 인공와우 이식(cochlear implantation; CI) 아동의 어음이해도(speech discrimination score; SDS)에 미치는 영향을 알아보고자 하는데 있다. 이 연구에는 CI 아동 12명이 참여하였다. 어음이해도 평가는 자체 제작한 무의미 3음절을 사용하였고, 음절 간 쉼 간격은 250, 500, 1,000ms로 조절하였다. 어음 강도는 대상자들이 가장 편하기 느끼는 강도(most comfortable loudness; MCL)로 하였다. 평가는 4지 선다형 보기에서 대상자들이 선택할 수 있는 방법(closed-set)으로 실시하였다. 어음이해도는 250, 500, 1,000 ms 순서로 62.08, 63.75, 69.58 %로 통계적으로 유의하지 않지만, 개선되는 경향이 나타났다(p = .4635). 이를 통해 음절 간 쉼 간격은 인공와우 이식 아동의 어음이해도에 영향을 미친다는 것을 알 수 있다.

• 대한음성학회:학술대회논문집
• /
• 대한음성학회 2003년도 5월 학술대회지
• /
• pp.105-108
• /
• 2003

The purpose of this paper was to evaluate the effect of auditory feedback on fundamental frequencies in prelingulally deaf children. Participants totaled three groups of sixty children: deaf children with cochlear implantation(CI), deaf children with hearing aids (HA), and children with normal hearing(NH). Fundamental frequencies were measured during sustained phonation of /a/. There were statistically significant differences of fundamental frequencies across the groups(p<.01). In post hoc analysis, HA and NH group showed statistically significant differences, but CI group didn't. In correlation analysis between Fo and the chronological age, there were significant negative tendencies in CI and NH group, but not in HA group. The characteristics of fundamental frequencies in CI group were found similar to NH group than HA group in this study. This could be understood as the effect of relatively sufficient auditory feedback after cochlear implantation.

• 재활복지공학회논문지
• /
• 제8권3호
• /
• pp.227-232
• /
• 2014

이 연구는 언어습득 이후 난청 성인의 인공와우 이식 후 음소 지각과 음소 지각에 오류 양상 등을 알아보고자 한다. 일측 인공와우를 1년 이상 사용한 23 세부터 79($49{\pm}14$) 세 사이의 21 명(m:f=13:8)의 자음 지각 검사를 이용하였다. 자음 지각 성적은 11~86 ($60{\pm}17$)%로 관찰되었고, 인공와우 교정청력(p< .046)을 제외한 술 전 청력, 난청 기간, 인공와우 이식 연령, 술 후 사용기간 등은 유의한 관계가 나타나지 않았다. 이는 언어발달이 정상적인 경우 다른 요인들 보다는 청력의 개선을 통한 청각적 자극이 자음지각에 가장 중요하다는 것을 시사한다. 음소 정답률은 마찰음(/ㅅ, ㅆ, ㅎ/)과 파찰음(/ㅈ, ㅉ, ㅊ/)이 71~92 ($79{\pm}7$)%로 파열음(/ㅂ, ㅃ, ㅍ, ㄷ, ㄸ, ㅌ, ㄱ, ㄲ, ㅋ/)과 유음(/ㄹ/) 및 비음(/ㅁ, ㄴ/)의 33~80 ($50{\pm}13$)%보다 높게 관찰되었다. 오류 양상은 조음 방법이 같은 음소들을 서로 혼동하는 경향을 보였으며, 이는 주파수의 미세한 변화나 강도의 시간적 변화를 변별하지 못한 것으로 보인다.

• 음성과학
• /
• 제12권4호
• /
• pp.197-202
• /
• 2005

The cochlear implantation(CI) as an useful tool for aural rehabilitation in bilateral severe to profound hearing impairment. However, CI prefer to usually one ear in spite of bilateral hearing impaired. because of the various characteristics of hearing loss, the hearing conservation for the future possibility, and socioeconomic condition of hearing impaired person and their families. The unilateral CI has limitations such as a directional loss, a difficult speech understanding in noise and a neural plasticity. These limitations will be overcome by hearing aid(HA) which is familiar with hearing impairer. but HA fitting for bimodal-binaural hearing are difficult because the difference output characteristic of HA and CI. This study will be confirm realities of use of HA in unilateral cochlear implantee. For this goal, 25(m:f=10:15) child participated who are used to HA for 1 to 17 months. We had telephone interviews with their mother about use of HA, change of auditory performance and own voice. As the results, hearing threshold levels of unimplanted ear, the use of a appropriate HA, implanted and aided hearing threshold level(HTL) are must be considered for successful biomodal-binaural hearing. Especially, implanted and aided HTL should be very useful parameter for a prediction of HA effect and a criterion of selection for bilateral cochlear implantation.

• 대한청각학회지
• /
• 제25권1호
• /
• pp.49-54
• /
• 2021

Type II mucopolysaccharidosis (MPS II) commonly known as Hunter syndrome, is a rare X-linked lysosomal storage disorder caused by iduronate-2-sulfatase deficiency, which in turn causes otorhinolaryngological manifestations, including sensorineural hearing loss (SNHL). Previously, the median survival age of patients with MPS was approximately 13.4 years. However, in the era of enzyme replacement therapy and other multidisciplinary care modalities, the life expectancy has increased. Herein, we report a rare case of an adolescent with MPS II who underwent SNHL treatment with cochlear implantation (CI). Based on unexpected findings of mastoid emissary veins and overgrowth of the vessels around the temporal bone, CI was performed using the transmeatal approach instead of the conventional transmastoid method, to avoid damage to the vessels. The average hearing threshold after CI was 35 dB and no surgical complications were encountered. Adolescent MPS II may present vessel abnormalities, which can reduce the success rate of surgery. In patients with MPS II with SNHL, CI should be performed under careful monitoring of vessel overgrowth. Moreover, with regard to feasibility of CI in adolescent patients with MPS II with SNHL, surgical techniques such as the transmeatal approach should be selected based on adequate assessment of the case.