• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.411-413
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• 2022

임상 환경에서 진료시간의 대부분은 환자의 증상을 듣고, 추가 증상을 이끌어내는데 사용된다. 이를 병력 청취라고 하며, 진료에 있어서 가장 기본적이고 필수적인 활동이다. 하지만 병력 청취에 대한 연구가 1940 년대부터 계속되고 있음에도 아직까지 표준이 정립되지 않았으며, 다양한 분야에 접목되는 딥러닝 기술 또한 병력 청취와 관련해서는 연구가 부족한 현실이다. 본 논문에서는 Symptom2Vec 을 새롭게 제안하였으며, 이를 활용하여 질병에 따른 증상의 평균 cosine 유사도 점수(0.962)로 병력 청취의 기준을 확립하였다. 또한 most similar word Top5 를 확인하는 것을 통해 환자의 증상에 따른 유사 증상을 묻는 병력 청취가 가능한 것을 확인하였다. 이를 통해 실제 임상 환경에서의 자동화된 병력 청취 시스템을 제안한다.

• The Journal of the Acoustical Society of Korea
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• v.43 no.2
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• pp.152-161
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• 2024

Although hearing loss in the elderly is one of the common symptoms of aging, as the aging population continues to grow, policies such as home care and welfare housing for the elderly are implemented with a focus on mobility, often overlooking the issue of hearing loss in the elderly. In this study, our aim is to enhance the quality of life for the elderly by improving the auditory environment within residential spaces, which plays a pivotal role in determining their overall well-being. We have proposed a technique that focuses on reducing reverberation, minimizing noise levels, and enhancing sound quality to improve the listening environment for the elderly, and we have verified its effectiveness. Building upon this, we have developed an acoustic design model for residential facilities catering to elderly home care.

• The Journal of the Acoustical Society of Korea
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• v.38 no.2
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• pp.139-144
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• 2019

Various room acoustic parameters and their optimal values were proposed and verified as proper interpretations to the listeners' preference of concert hall sounds. However the listening environment has been changed since they were developed, and the listeners' preference may not be the same among countries of different cultural backgrounds. Actual listeners' preference should be applied to the design of a new concert hall. A survey on the listening preference was carried out for 22 music experts. A room acoustical design process was proposed which made the acoustical environment of a concert hall as close to the listeners' preferences.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2012.04a
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• pp.497-498
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• 2012

• Proceedings of the ESK Conference
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• 1997.10a
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• pp.179-185
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• 1997

작업장 뿐만 아니라 일상생활에서도 결코 무시될 수 없는 것이 레져활동으로 인한 소음이다. 최근 급격히 늘어가는 개인 휴대용 카세트(Personal Cassette Players: PCP)사용은 심각한 소음성난청 발생이 우려된다. 본 연구는 PCP사용에 관련된 여러 인자들이 청력손실과 어떻게 얼마나 관련이 있는가를 파악 하고 PCP를 일정시간 사용했을 때 오는 청력 손실을 정량적으로 파악, 분석하는데 근본 목적을 둔다. 정상 청력을 가진 피실험자 18명의 대학생들을 대상으로 정상 청취조건 그리고 배경소음(지하철)에 노출 중과 후의 사용환경과 소음원으로 Hard Music, Soft Music 및 Language/News를 고려하여 평균소음도와 최고 소음도를 측정하였다. 또한 현실적 상황을 고려한 2시간 정도의 PCP의 청취 전과 후의 청력변화를 측정하였다. 통계 분석 결과, 사용환경과 소음원에 대해 휴대용 카세트 청취 소음수준이 유의한 차이가 있었으며, 특히 Hard Music 청취시에는 95dB, 그리고 지하철 소음하에서는 92dB의 높은 (위험한) 청취수 준을 보였다. 최고소음수준의 경우 NIOSH기준을 초과하는 117dB 정도의 매우 위험한 수준까지 나타났다. 또한 2 시간 정도의 PCP소음에 노출 전 후의 청력손실이 주파수 대역에 걸쳐 유의하게 나타났으며, 특히, 가장 민감한 주파수 대역인 4000Hz에서 최고 7dB 정도의 청력 손실이 발생하였다. 본 연구 결과에 따라, PCP사용에 대한 청력보호대책안을 제시하고자 한다.

• The Journal of the Acoustical Society of Korea
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• v.40 no.1
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• pp.18-30
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• 2021

The ultimate goal of the present study is to establish the acoustical performance standards of classroom for the elderly who are incomplete hearing people. As a pilot survey, the present study was conducted to investigate the listening environment and the actual condition of speech perception performance of education facilities for elderly, Acoustic performances of two education facilities for elderly in Cheongju were measured and questionnaire survey was done to elderly people. Also, speech intelligibility tests were undertaken by Consonant Vowel Consonant (CVC) and Phonetically Balanced Words (PBW) methods. The questionnaire survey showed that the elderly were satisfied with the listening environment of the educational facilities in general. Also, it was found that acoustical performances satisfy with the acoustic criteria of general classrooms in Korea. However, the results of the speech intelligibility test showed that the scores of elderly were significantly lower than twenties with normal hearing. It was also revealed that the scores are reduced as the age increases. Thus, it was concluded that the acoustical performance standards of educational facilities for the normal hearing were not suitable for educational facilities for the elderly.

• The Journal of the Acoustical Society of Korea
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• v.40 no.3
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• pp.201-212
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• 2021

The present study was conducted as a pilot investigation to suggest the standards of acoustic performance for classrooms suitable for incomplete hearing people such as children under 9 years of age. Subjective evaluations such as questionnaire and speech intelligibility test were conducted to 264 students at two elementary schools in Cheong-ju in order to analyze the characteristics of the listening environment in the classrooms of the lower grades in elementary school. The survey was undertaken with a total of 264 students at two elementary schools in Cheong-ju, and investigated their satisfaction with the classroom listening environment. As a result, students responded that the most helpful information type for understanding class content is the voice of teacher. In addition, the volume of the current teacher's voice is normal, and the level of clarity is highly satisfactory. As for the acoustic performance of the classroom, the opinion that the noise was normal and the reverberation was very short was found to be dominant in overall satisfaction with the listening environment. Meanwhile, as a result of speech intelligibility test using the word list selected for the lower grade students of elementary school, it could be inferred that the longitudinal axis distance from the sound source in the case of 8-year-olds is a factor that affects speech recognition.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.12
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• pp.210-216
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• 2013

It is hard to listen to the music clearly in the presence of background noise. In this paper, a method that modifies the audio signal automatically to enhance the audio listening experience in adverse environment is proposed. Specifically, the method that amplifies the audio signal so that the perceived loudness of audio signal in each band becomes similar to that of the noiseless signal. The loudness perception model proposed by Moore et. al is utilized. Extending the previous work that is applied to speech reinforcement, the full band signal sampled at 48kHz is manipulated based on the loudness restoration principle. Moreover, based on the observation that the audio clarity is compromised even with loudness restored signal, a modification that intentionally boosts high frequency loudness more than lower band is also proposed. Experimental results showed that the proposed algorithm can enhance the audio listening experience in adverse environment.

• The Journal of the Korea Contents Association
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• v.21 no.5
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• pp.422-434
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• 2021

This study aims to explore the structural relationships among experiences of being heard in home and school settings, self-esteem, and human rights awareness. Among the 2017 NYPI Cross-sectional Survey on the Rights of Youth & Children, 6,405 middle and high school students (47.8% females) were used to conduct a structural equation modeling using Mplus. It was found that children who experience being heard in the home or school display higher levels of self-esteem and awareness of human rights. It was also found that self-esteem is more likely to increase awareness of human rights. Self-esteem was also found to mediate the pathway between the experience of being heard at home or school and human rights awareness. In addition, there was no significant difference in path coefficients depending on whether they received human rights education. Practical implications for promoting home and school environments where children's opinions can be heard were discussed.

• The Journal of the Acoustical Society of Korea
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• v.40 no.6
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• pp.678-682
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• 2021

Reverberation Time (RT) with noise levels can affect speech recognition ability in a listening environment. The degree of influence may depend on reverberation times and modes of binaural hearing. In this study, Korean monosyllabic Word Recognition Scores (WRS) were investigated in 10 young normal hearing subjects under binaural conditions. The RT of 3.4 s and signal to noise ratio of 0 dB were used at 55 dB HL for diotic (noise with the same phase) and dichotic (noise with the fixed phase difference, π) conditions. The improvement in WRS was noted in dichotic hearing (p < 0.05) while the similar trend was not observed in diotic hearing. This data may be useful in analyzing psychoacoustic effects of RTs under noisy conditions.