MODIFIKASI ALAT MEDIS STETOSKOP UNTUK MONITORING SUARA JANTUNG MENGGUNAKAN TAMPILAN GUI MATLAB

Heart sounds are very important for the initial diagnosis of a disease. This article aims to modify the stethoscope's medical device by adding a Low Pass Filter (LPF) and a condenser sensor so that data can be recorded in a digital device. The stages of tool development begin with analysis, design, development and testing. At the analysis stage, it was stated that a conventional medical stethoscope can only be done by a medical expert directly, where data cannot be stored for detailed analysis purposes, the device is not equipped with LPF which can limit the frequency in a certain range, monitoring data can displayed in the Matlab GUI. The results of testing tools through functional tests indicate that the addition of LPF can reduce noise when retrieving heart sound data and data can be monitored through the Matlab GUI display. The results of the development of this tool are expected to improve accuracy in diagnosing heart sound abnormalities through monitoring data on the Matlab GUI display.

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Thermal analysis, design, and implementation of an L‐band high‐power stepped impedance low‐pass filter

International Journal of Circuit Theory and Applications ◽

10.1002/cta.2878 ◽

2020 ◽

Vol 48 (12) ◽

pp. 2078-2096

Author(s):

Zohre Pourgholamhossein ◽

Gholamreza Askari ◽

Fattah Talaei ◽

Hamid Mirmohammad Sadeghi

Keyword(s):

Thermal Analysis ◽

High Power ◽

Pass Filter ◽

Low Pass Filter ◽

Design And Implementation ◽

Low Pass ◽

Analysis Design ◽

L Band

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Active Filter Analysis on Designing Electronic Stethoscope

Jurnal Elektronika dan Telekomunikasi ◽

10.14203/jet.v19.51-56 ◽

2019 ◽

Vol 19 (2) ◽

pp. 51

Author(s):

Prihatin Oktivasari ◽

Riandini Riandini ◽

Rahmah A. Fitri ◽

Sungguh I. Malaon

Keyword(s):

Fourth Order ◽

Heart Sound ◽

Cutoff Frequency ◽

Pass Filter ◽

Low Pass Filter ◽

Electronic Stethoscope ◽

Recorded Sound ◽

Low Pass ◽

High Pass

Early heart disease detection could be vital and some other diagnostic ways are being developed. In this paper, a lowcost tool for a diagnostic that analyzes the digitized heartbeat sound is given. This can be used to detect heart anomalies. The instrument shows the heart sound and also keeps a patient's long-term record for future use. The signal from the heart provides a lot of knowledge about the heart and offers an initial diagnosis recommendation. The electronic stethoscope uses the condenser microphone, preamplifier circuit, and filter circuit. The optimum filter is Butterworth with a fourth-order Sallen key low pass filter topology with a gain of 0.707 volts, -3.01 dB, and a fourth-order high pass filter with a gain of 0.782 volts, -2.137 dB. The frequency of the heart sound is about 20 Hz – 120 Hz in general. Therefore, the lower cutoff frequency of the filter is set to 20 Hz, while the higher cutoff frequency set to 120 Hz. The evaluation used to measure the performance of an electronic stethoscope is to compare with a conventional stethoscope, the recorded sound is the same.

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