Title :
Separation of fine crackles from vesicular sounds by a nonlinear digital filter
Author :
Ono, Mariko ; Arakawa, Kaoru ; Mori, Masashi ; Sugimoto, Tsuneaki ; Harashima, Hiroshi
Author_Institution :
Fac. of Med., Tokyo Univ., Japan
Abstract :
Crackles are discontinuous adventitious sounds, and their separation is an important process in the analysis of lung sounds. In order to separate the crackles from vesicular sounds automatically, a nonlinear digital filter which was designed to separate nonstationary signals was used. This filter was applied to the lung sounds recorded from six patients with pulmonary fibrosis. The separation was satisfactory enough to make this method useful in clinical medicine.<>
Keywords :
bioacoustics; digital filters; lung; clinical medicine; discontinuous adventitious sounds; fine crackles; nonlinear digital filter; pulmonary fibrosis patients; vesicular sounds; Digital filters; Lungs; Signal design; Diagnosis, Computer-Assisted; Humans; Pulmonary Fibrosis; Respiratory Sounds; Signal Processing, Computer-Assisted;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
