呼吸系统声传播特性分析的一种新方法

分析了传导语音信号的产生与传播过程，建立了传导语音信号的数学模型，在模型的基础上，研究了传导语音信号的功率倒谱的特点，提出了利用同态处理技术分析呼吸系统声传播特性的一种新方法。实验结果表明，正常呼吸系统有一个共振峰，肺实变处呼吸系统有两个共振峰，且第二共振峰在系统中起主要作用，这种新方法是一种简单、有效的方法。

A NEW ANALYSIS METHOD OF ACOUSTIC TRANSMISSION CHARACTERISTICS OF RESPIRATORY SYSTEM

The generation and hanslnission proals of hansmittal sound signals (TSS) is analtysedand a mathematical model of TSS is established in this paper. The power cepsuslcharacteristics of TSS are studied based on the mathematical model and a new analysis method of acoustic txansmission of respilatory syStem using homomorphic processing technique isproposed. The experimental results show that the nounal respiratory system has only onefonnant, while the abnonnal respiratory syStem parenting lung consolidation has twofonnants which the second one plays an boortant role in that systhe. the new method is a simple and an effective one.