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Search for "heart sound classification algorithm" in Full Text gives 1 result(s) in Beilstein Journal of Nanotechnology.

A wearable nanoscale heart sound sensor based on P(VDF-TrFE)/ZnO/GR and its application in cardiac disease detection

Yi Luo,
Jian Liu,
Jiachang Zhang,
Yu Xiao,
Ying Wu and
Zhidong Zhao

Beilstein J. Nanotechnol. 2023, 14, 819–833, doi:10.3762/bjnano.14.67

system designed in this paper can collect heart sound signals in real time and predict whether the heart sounds are normal or abnormal, providing a new solution for the diagnosis of heart diseases. Keywords: composite piezoelectric nanofilm; electrospinning; heart sound classification algorithm; heart

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Figure 1: Preparation process of composite piezoelectric nanofilm.

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Figure 2: Flexible sensor packaging.

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Figure 3: Actual sensor.

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Figure 4: Acoustic-electric conversion performance test platform.

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Figure 5: Block diagram of the heart sound acquisition and classification system.

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Figure 6: XRD patterns of the three composite piezoelectric nanofilms.

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Figure 7: (a) FTIR spectrum and (b) variation curve of β-phase content.

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Figure 8: (a) SEM image of the P(VDF-TrFE) film, (b) enlarged part of (a), (c) SEM image of the P(VDF-TrFE)/Z...

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Figure 9: (a–c) Voltage distribution and (d–f) stress distribution in the piezoelectric film at sound pressur...

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Figure 10: Voltage response diagram of the sensor at a sound frequency of 180 Hz and different sound pressures...

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Figure 11: Sensor response at frequencies from 0 to 2 kHz at 65 dB sound pressure.

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Figure 12: Different frequency voltage response diagram of the sensor at 65 dB sound pressure.

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Figure 13: Open-circuit voltage plot of the sensor at 65 dB sound pressure at different frequencies.

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Figure 14: (a) Piezoelectric coefficient measurement system and (b) results of the piezoelectric coefficient.

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Figure 15: Example of KNN classification algorithm.

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Figure 16: Heart sound time domain diagram before pretreatment. Figure 16 contains information from [PhysioNet/CinC Cha...

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Figure 17: Heart sound time domain diagram after pretreatment. Figure 17 contains information from [PhysioNet/CinC Chal...

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Figure 18: Wavelet packet decomposition and optimal basis selection diagram.

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Figure 19: Validation confusion matrix of heart sound classification model (fine KNN).

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Full Research Paper

Published 31 Jul 2023

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