On modeling impulsive bioacoustic signals with symmetric /spl alpha/-stable distributions: application in discontinuous adventitious lung sounds and explosive bowel sounds

Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI:10.1109/IEMBS.1998.745810

L. Hadjileontiadis, S. Panas

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引用次数: 7

Abstract

A new perspective in modeling impulsive bioacoustic signals (BS) by means of symmetric /spl alpha/-stable distribution (S/spl alpha/S) is presented in this work. The method was applied in discontinuous adventitious lung sounds and explosive bowel sounds drawn from BS databases, after de-noising. Their non-Gaussianity due to their strong impulsiveness was confirmed and S/spl alpha/S-based model was used for autoregressive (AR) estimation of their source signal. Via the parameters of S/spl alpha/S (a, /spl alpha/ and /spl gamma/) the effect of the transmission path on the impulsive nature of the source was described. Values of the covariation coefficient /spl lambda//sub XY/ confirmed a correlation of squawks and fine crackles in their production mechanism.

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对称/声压α /稳定分布的脉冲生物声学信号建模:在不连续的不定式肺音和爆发性肠音中的应用

本文提出了利用对称/声压α /稳定分布(S/声压α /S)对脉冲生物声信号进行建模的新思路。将该方法应用于BS数据库中提取的不连续的不定音和爆发性肠音，经去噪处理。基于S/spl alpha/S-based模型对其源信号进行自回归(AR)估计。通过S/spl alpha/S (a， /spl alpha/和/spl gamma/)参数描述了传输路径对源脉冲特性的影响。协变系数/spl λ //sub XY/的值证实了尖声和细裂纹在产生机制上的相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)

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