一种用于分析呼吸系统声学传输特性的倒谱方法。

A cepstral method for analysis of acoustic transmission characteristics of respiratory system.

作者信息

Xu J, Cheng J, Wu Y

机构信息

Department of Biomedical Engineering, Xi'an Jiaotong University, Shaanxi, China.

出版信息

IEEE Trans Biomed Eng. 1998 May;45(5):660-4. doi: 10.1109/10.668757.

DOI:10.1109/10.668757

PMID:9581065

Abstract

The generation and transmission process of transmitted sound signals (TSS) is analyzed and a mathematical model of TSS is established in this paper. The power cepstral characteristics of TSS are studied based on the mathematical model and a new analysis method of acoustic transmission of respiratory system using homomorphic processing technique is proposed. The experimental results show that the normal respiratory system has only one formant, while the abnormal respiratory system presenting lung consolidation has two formants and the second formant plays important role in that system. This new method is a simple and effective one.

摘要

本文分析了透射声信号（TSS）的产生与传输过程，建立了TSS的数学模型。基于该数学模型研究了TSS的功率倒谱特征，提出了一种利用同态处理技术对呼吸系统声传输进行分析的新方法。实验结果表明，正常呼吸系统只有一个共振峰，而呈现肺实变的异常呼吸系统有两个共振峰，且第二共振峰在该系统中起重要作用。这种新方法简单有效。