Title :
A cepstral method for analysis of acoustic transmission characteristics of respiratory system
Author :
Xu, Jingping ; Cheng, Jingzhi ; Wu, Yanjun
Author_Institution :
Dept. of Biomed. Eng., Xi´´an Jiaotong Univ., China
fDate :
5/1/1998 12:00:00 AM
Abstract :
The generation and transmission process of transmitted sound signals (TSS) is analyzed and a mathematical model of TSS is established here. 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 a 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.
Keywords :
acoustic wave transmission; bioacoustics; cepstral analysis; lung; physiological models; transfer functions; abnormal respiratory system; cepstral method; formant; homomorphic processing technique; lung consolidation; lung-sound research; mathematical model; respiratory system acoustic transmission characteristics; respiratory system model; transmitted sound signals; Autoregressive processes; Biomedical engineering; Cepstral analysis; Frequency estimation; Lungs; Mathematical model; Mouth; Respiratory system; Speech; Transfer functions; Adult; Algorithms; Humans; Lung Diseases; Male; Models, Biological; Reference Values; Respiratory Sounds; Signal Processing, Computer-Assisted; Transducers;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
