• 전기학회논문지
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• 제56권6호
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• pp.1139-1143
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• 2007

For the possible application of monitoring or diagnosing heart sounds in an ubiquitous healthcare environment. a small and light electro-stethoscope that can be attached in human body should be exploited. With this aim, this study proposes a new style of electro-stethoscope device that is composed of four hardware modules in wearable style. For this ambulatory heart sound collecting device, the several tests must be performed to check portability and material capability for collecting heart sounds. It turned out to be that the multi-channel electro-stethoscope can detect heart sound signals well even if it is not pinpointed in the accurate stethoscope point on a heart. Consequently, our ambulatory electro-stethoscope hardware system can be applied to monitor or diagnose abnormal heart sounds in the ubiquitous healthcare system.

• 한국정보전자통신기술학회논문지
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• 제1권3호
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• pp.41-47
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• 2008

본 연구에서는 기존의 청진기를 대체할 수 있으며, 멀티미디어 PC에 연결할 경우 청진음의 저장이 가능하여 병원에 직접 방문하지 않고 가정에서 청진음을 저장하고 초고속 통신망을 통해 병원에 전송함으로써 가정에서도 쉽게 정기적인 검진이 가능한 홈 헬스케어를 위한 무구속 정자청진 모듈을 개발하고자 하였다. 이를 위하여 저잡음, 고이득, 저전력 그리고 저전압 구동의 특징을 갖도록 전자청진기용 증폭기를 설계하였으며, 제작된 전자청진 회로를 이용하여 심음 측정에 중요한 요소로 판단되는 집음기를 재질, 크기별로 제작하여 테스트 하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.310-312
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• 2004

The aim of this study was to analyze the characteristics of knee joint sound in frequency domain and classify the knee joint diseases. The spectral analysis of knee joint sounds was performed using LPC(Linear Predictive Coding) and Wigner-Ville distribution. Ten normal subjects and 5 patients with meniscal tearing were enrolled. Each subject was seated on a chair and underwent active knee flexion and extension for 60 seconds. Sampling frequency was 10kHz and electronic stethoscope and electro-goniometer were applied during the knee motion for data collection. The spectral analysis showed 3 peaks in both groups and the difference energy distribution in time-frequency domain. These results suggest that the diagnosis of knee joint pathology using the auscultation could be easier and more correct.