使用Mel频率塞普斯特尔系数进行增强的心声分类,并对单个与集体分类器策略进行比较分析
Mehdi Hosseinzadeh1,2, Amir Haider3, Mazhar Hussain Malik4
1School of Computer Science, Duy Tan University, Da Nang, Vietnam.
PloS one
|December 31, 2024
概括
这项研究改进了使用Mel频率头系数 (MFCCs) 的异常心声检测. 使用MFCC的整体分类器策略优于单个分类器,突出了单个节拍分析的重要性.
科学领域:
- 生物医学工程 生物医学工程
- 信号处理 信号处理
- 机器学习 机器学习
背景情况:
- 检测异常的心脏声音对于诊断心脏病状况至关重要.
- 梅尔频率头系数 (MFCC) 是分析心脏声音的有效声学特征.
- 现有的心声分类方法需要优化以提高准确性.
研究的目的:
- 为了提高MFCC的性能,以检测异常的心脏声音.
- 为了将单个分类器策略与集体分类器策略进行比较,用于心声分类.
- 为了评估MFCC与其他声学特征的有效性.
主要方法:
- 预先处理心脏声音并将其细分为S1,静脉缩,S2和静脉缩间隔.
- 从每个细分段提取13个MFCC,每节奏产生52个MFCC.
- 实施了两种分类策略:单一分类器 (MFCC的平均值) 和整体分类器 (对个别节奏分类的多数投票).
主要成果:
- 整体分类器的策略取得了更高的准确性:93.59% (SVM),91.84% (kNN) 和92.22% (DT).
- 单一分类器策略的准确率为91.95% (SVM),91.9% (kNN) 和87.33% (DT).
- 在类似的研究中,MFCC被证明比时间,时间频率和统计特征更有效.
结论:
- 与单个分类器方法相比,集体分类器策略显著提高了分类准确性.
- 在单一分类器策略中,在多个节拍中平均MFCC降低了关键的诊断线索.
- 多种心脏声谱,特别是当与合并策略分析时,提供了一种强大的方法来检测心脏异常声音.
相关概念视频
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Cardiac auscultation is a clinical skill used to assess heart function and detect abnormalities. It involves listening to heart sounds at specific anatomical locations through a stethoscope.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
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Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular...
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Gallops:
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